School Science Lessons
Goat Project
Updated: 2008-08-27
Please send comments to: J.Elfick@uq.edu.au
See also: Interesting
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Table of contents
1.0 Advantages and disadvantages of keeping
goats
2.0 Parts of a goat
3.0 Different ways of keeping goats
4.0 Breeds of goats
5.0 Planning the goat project
6.0 Rearing a kid
7.0 Building a house and making a fence
8.0 Planning to buy adult goats
9.0 When the goats arrive
10.0 Behaviour of goats
11.0 Caring for goats
12.0 Feeding goats
13.0 Breeding goats
14.0 Diseases of goats
15.0 Milking goats
16.0 Post-mortem - digestive organs
17.0 Reproductive organs
18.0
Understanding the records
Preface
Goats, Bovidae capra, are
quite useful animals because they can produce meat and milk
for the people to eat and drink. It has been said that goats are bad
animals
to keep because they eat the leaves of shrubs and young trees as well
as
grass, and can be very destructive. However, if they are managed
properly
they are not so damaging. For instance on some of the atolls, goats
have
been released on only one of the small islands around the lagoon. They
cannot escape from this islet, and so they cannot damage the other
islets.
On large islands it may be possible to build a fence around a goat
pasture,
then they cannot escape and run away into the hills. However, it must
be
remembered
that goats can live quite well by themselves in the wild state. Most of
the world's goats are found in India, China and East Africa, but large
numbers are also found in Turkey, Lebanon, Greece, Iran and Brazil. In
the Pacific Islands goats have done well in Fiji and some of the other
high
islands.
It has been shown that they can also live well in Kiribati. Pure bred
goats of the European milking breeds are not recommended for tropical
regions. because they have a high mortality from diseases. Male goats
are called "billy goats" or bucks and the females are called does. New
born young goats are called kids. It takes five months from the time a
doe is mated to kidding. It takes three months from kidding to weaning
when the young kids are taken from their mothers and fed on
grass.
1.0 Advantages and disadvantages of
keeping
goats
1. Advantages of keeping goats
1.1. Adaptability
Goats can adapt or adjust themselves to different situations. They
can live and gather food from cold windy mountains or from hot dusty
deserts
where few plants grow. They can live quite well on all kinds of Pacific
Islands. They do not like to be wet and cold, but if they are given a
good
dry house, they can live in these climates.
1.2 Sure-footedness
Goats can walk quite well on land that is far too steep or rocky for
other kinds of farm animals. This means that they can gather food
from places which other farm animals may not be able to visit.
1.3 Browsing
Goats are able to eat grass quite well, but they can also eat the
leaves
of most kinds of bushes, trees and shrubs. They can also eat plants
like
thistles, giant mimosa and briars which have sharp thorns or prickles.
Goats have very tough mouths, even young goats can eat prickly plants
quite
easily. Goats can make use of food that other animals may not touch. It
is this ability to eat almost any plant that has given goats a bad
name,
because if food is scarce, they may strip leaves from bushes and young
trees. However, if they are carefully managed, this severe damage
should not
happen. Do they think goats might be a threat to the land? Do they
think
there would be enough green feed for the goats where you live?
1.4 Diseases
Goats do not seem to catch many diseases and they do not have many
pests. So they are tough animals that do not cause much trouble in
keeping
them. The main trouble is that they may get a lot of worms growing in
their
intestines, but this trouble can be stopped by using some worm medicine
for the goats to swallow, such as Nilverm.
1.5 Provide good food
Goats are able to provide the people with two kinds of valuable food
meat and milk. Goat milk is very good for children because it does
not contain disease germs. The meat is also good and is just like sheep
meat.
2. Disadvantages of keeping goats
2.1 Goats need a very large amount of food each day. They need much
more food than a sheep needs, and more food than cows on a body weight
comparison. This is a problem on small islands. Also, goats need to
find
a lot of protein, so they must be able to find some legumes or other
food
rich in protein.
2.2 Goats will eat almost any kind of green feed. So if young trees
have been planted, they will be eaten by the goats unless they are
protected
in some way. Also goats may strip many leaves from slow growing shrubs.
Unless they are fenced out, they will also eat all kinds of green
vegetables
in a garden.
2.3 If goats are not fenced in or kept in such away that they can be
brought back to their house at night, they may escape and live in the
wild
state. Then it may be very hard to get them back because they can run
very
fast and can easily run over very rough ground.
3. In your region or island do they think there would be enough green
feed for the goats?
Male goats are called "billy goats" or bucks and the females are called
does. Newly born young goats are called kids. It takes five months from
the time
a doe is mated to kidding. It takes three months from kidding to
weaning
when the young kids are taken from their mothers and fed on
grass.
2.0 Parts of a goat
See diagram 57.2: Parts of a goat, musk glands
The head: The dark pupil of the eyes is extended sideways. The mouth
contains grinding teeth or molars at the back of both jaws, but at the
front of the mouth the sharp incisor teeth are in the lower jaw only.
There
is a hard pad at the front of the upper jaw. The goat grasps leaves
between
the teeth in the lower jaw and the hard pad on the upper jaw and tears
off leaves by a sharp movement of its head. The breathing nostrils are
just above the mouth. On the chin just underneath the mouth there is a
tuft of hairs called the beard, but some goats do not have this.
At the back of the lower jaw, some goats have two pieces of skin
hanging
down. These are called tassels or "bells". Nobody knows why some goats
have these bells and it is not known if they have any use.
Horns are found in some breeds of goats, but other breeds are hornless.
In most breeds it is important for the males to have horns or the kids
may not be a normal sex, but may be half male and half female. If the
horns
are present, then it is important to look at the skin which lies behind
the polls on the back of the head. In this position there is a strip of
skin about 1 cm wide which is
the place where the musk gland is found. If this gland is working then
the skin will be raised a little and folded and will look thickened and
glistening as if it is wet. This gland makes a bad smelling substance
called
musk which gives goats a special smell. The billy goats rub their heads
on other goats to put this smell mark on other goats.
The ears of goats are of special interest because they are of special
shapes in the different breeds. The ears vary a great deal in length
and
also how they are held. In some breeds the ears are fairly short and
are
held up. In others they are held out sideways, but in others they hang
right down on the side of the face.
The body: The body of the goat has a large belly or abdomen, because
of the large amount of food it eats.
At the top of the chest are the withers which mark the top of the
shoulder.
The heart girth is the distance right down and around the chest just
behind
the
front legs. It is important for the chest to be big here so that the
animal can breathe easily when it is climbing hills or running.
The rump is the back part of the body and goes from the hip bones to
the butt of the tail. In some goats this rump slopes down a lot as you
see in diagram A.
The tail of the goat is short and usually has a fringe of long hairs
on it.
The udder of a female goat can be very large in size. It has only two
teats, but these are often of very large size. This makes is easy to
milk
these goats.
In front of the udder are two large veins which can be seen running
along the underside of the
belly or abdomen. These are the milk veins and it is good if they are
large.
Legs: It is important that the legs of the goat are strong and the
animal stands straight on them. There should be some strong muscle on
the
upper part of
each leg, the forearm and the thigh on the back legs.
The bottom of the feet ends in two half hoofs, because goats belong
to a special group of animals that are called "ruminants". These
animals
have two
special features:
1. They are cloven footed animals with the hoof split into two halves.
2. They chew their food twice, once when they first eat it, and then
again when they are lying down after feeding.
There are other things to notice about goats.
The size of the body may be large, medium or small.
Fully grown goats in tropical regions are about 25 to 30 kg and live to 7 to 10 years.
Some goats are called dwarfs because they are so small.
White goats can be burned by the sun so they need shade.
1. Observe the head, the eyes, the nostrils
and the beard.
2. Open the mouth and see the two kinds of teeth and also the
bony part at the front of the upper jaw.
3. Observe the horns, if present. Look closely for
the signs of the musk gland.
4. Observe the ears.
5. Observe the withers, the hip bones, the rump and the tail. Observe
the chest, heart girth and the large belly or abdomen.
6. Observe the udder, the teats and the milk
veins.
7. Observe the feet and the hooves.
What is the name of a female goat? A. Doe.
What is the name of the scent gland at the base of the horns? A Musk
glands.
What is the name of the grinding teeth at the back of the mouth? A.
Molars.
What is the name of the bits of skin that hang down under the jaws
of some goats? A. Tassels or bells.
3.0
Different
ways of keeping goats
See diagram 57.3: Housing goats
1. Subsistence goat keeping
This is where a man keeps just a few goats for his own family to use.
They may use the goats for meat and milk. The goats may be allowed to
gather
their feed over the man's land, or they may be tethered for feeding in
different places. However, the important thing about this way of
keeping
goats
is that only a few goats are kept enough for just one family.
2. Extensive goat keeping
In places where there is not much rain or where it is too hard to build
a fence around goats, or where there may be just a short wet season,
the
goats may be allowed to feed over a large area of land. The owner may
build
some houses for the goats, and if he does, the goats may return to
these
houses at night time. These goats will spend all day looking for food
which
may be hard to find.
3. Intensive goat keeping
In this system all the food the goats need must be brought to them
each day. It will be important to give them some shrub leaves as well
as
soft green feed. The only reason for keeping goats this way is if you
had
a lot of milking does and you could sell the milk in a town or village.
This money would pay for some of the food supplements you may have to
buy
for them.
4. Semi-intensive goat keeping
In this system the owner builds houses for the goats and gives them
some special rich food supplements as well, but he also lets the goats
go out each day to gather their own food. This means the owner has to
buy
less food supplements. However, if this is done, the owner must keep
control
of the goats they must not be allowed to run away wild. So it is
necessary
for the owner to build some kind of fence. Where a long piece of land
goes
out into the sea, only a short fence may be needed across a narrow part
of this land to keep the goats inside.
4.0
Breeds
of goats
See diagram 57.4: Breeds of goats
Anglonubian.
The Anglonubian is a large goat of the meat type. It is suited to hot
climates.
This breed of goats comes partly from Egypt and India and so it stands
heat well. It is a very big goat and is very easy to recognize because
its ears are
very long and hang down alongside the head.
It may have no horns in either sex, and the nose is rounded. There
are many possible colours but white and roan are common. This goat
produces
milk
of good quality, and a yield of 2.2 pounds or 1 kg of milk a day is
an average figure. Although the udder of this goat is not a very good
shape,
it is held
up higher than in most other breeds and so it does not get caught on
objects near the ground.
The coat is flat and there is a layer of fat just under the skin. This
enables the goat to stand high and low temperatures well.
British Saanen
The Saanen is a smaller white breed and is the best milk producer
of all goat breeds.
This is a milk breed which grows well in tropical climates, although
it may suffer from sunburn. When mating goats of this breed it is
important to use horned bucks
if available. If this is not
done, the kids may be born as intersexes, half male and half female.
Such kids are useless and are usually destroyed at birth.
British Alpine
The British Alpine is a large black goat with white on the legs
and face. It produces a lot of milk.
This is another milk breed which can live well in the tropical
countries.
It is easy to tell because it is black in colour with white patches on
legs, udder,
hindquarters and face. The udder is large and may hang down low, but
a large quantity of milk is produced. An average doe may produce 2.9
pounds
or 1.3 kg of milk a day.
The British Alpine is a big goat with long legs. It is able to live
well on rough pastures.
Toggenburg
This is a small brown and white breed which does well on rough
pastures,
but it is not as suitable for tropical climates as other breeds.
Angora
This is a breed of goats which produces long hair which can be cut
off and sold, but it is not a popular breed in the tropics.
5.0
Planning
the goat project
If you want to have goats at the school, there are many ways of doing
this, and you must decide which way you will use. You can have a very
young
kid that has been with its mother for 3 or 4 weeks. Or you may have a
kid
that is over 3 months old and is no longer having any milk at all: or
you
can buy young adult goats. You must decide what kind of goat you want,
but to decide these things there are some facts you must know.
1. Until they are two weeks old, young kids must have their mothers
milk, because this milk has foods in it that make the kid strong and
keep
diseases away. So you can never have a very young kid unless you buy
its
mother too.
2. Kids must have some milk until they are three months old. Female
kids less than 3 months old need 1 kg of milk each day. Male kids of
this
age need 1.5 kg of milk
a. Some cow's milk each day or b. Some goat's milk each day or
c. You must be able to make up some milk substitute from powdered full
cream milk or skim milk, but it is not easy to make up this milk
properly,
put into it all the things the kid needs, and keep everything very
clean.
3. Some people feel that it might be too much trouble to rear a kid
and look after it properly, so they decide to buy some older goats,
perhaps
a male and a female that are one year old. It is cruel to keep one goat
by itself, because goats are family animals, they like to have some
other
goats near them. So it might be best to order one male and one female.
Be careful to ask for a horned male: then there is less chance of
having
kids born that are intersex, both male and female, which cannot breed.
6.0
Rearing
a kid
This lesson can only be used if a kid is brought to the school. For
the first two weeks the kid must be left with its mother, but after
that
it can be
separated from her. To rear a kid it is necessary that it is given
some milk.
a. It can be given some cow's milk. This milk must be warmed before
it is given to the kid. If the kid was 7 pounds or 3 kg when it was
born,
then it
should have one pint or 20 fluid ounces of milk each day. This should
be given in 4 or 5 feeds a day. Each day the kid can be given one more
ounce of
milk, but it must not be given more than 60 ounces (or three pints)
of milk each day.
b. It is much better if the kid can be given goat's milk instead of
cow's milk, but the milk must be warmed before being fed to the kid.
c. If it is not possible to get real milk the kid can be fed on warmed
artificial milk made from skim milk or from powdered full cream milk.
To
this milk
must be added a very small amount of vitamin oil (not more than 1/4
teaspoonful per day). After 4 weeks of age the kid should be given a
little
of the
food which is chewed twice by a doe. If there are no goats, then a
little of the chewed food of a cow will do. This is done so that the
microbes
of the
doe's stomach can be put into the stomach of the kid. These microbes
can then help the kid to digest leaves and grass.
d. If there is a doe nearby, some of its chewed food can be obtained
this way:
Keep quiet and wait until you see that the doe has brought some food
up from her stomach into her mouth. Then use one finger to hook out a
little
of the food. Put this into the kid's mouth. The feeding of a kid is
difficult
because if it is not done properly the kid will get sick and may die.
The
best way to feed the milk is to use a bottle and a rubber teat to put
over
the mouth of the bottle. However, the bottle and the teat must first be
cleaned.
Do it this way:
7.0
Building
a house and making a fence.
A gate must be built in the fence.
8.0
Planning
to buy adult goats.
You may decide to buy adult goats and not to try to rear kids. These
notes may be helpful to you if you decide to buy older goats.
a. Goats are family animals. They like to have the company of other
goats. So it is cruel to keep only one goat. It is better to buy two
goats,
either two
females or a billy and a doe.
b. The first thing to be done is to gather some food for the goats.
It is not a good idea to feed goats only on soft green feeds. They
should
also have some
tough leaves and twigs from bushes.
c. Goats will also need some clean water to drink.
d. Goats will also need a warm dry house to sleep in. The house can
be the same design as the one built for kids, but may need to be a
little
bigger.
e. It may be necessary to provide a fence for the goats to keep them
near the house until they have got used to being moved. This fence must
be big enough to include some grass, some shrubs and some shady trees.
f. If it is desired to build a fence to keep a billy inside the fence
must be strong and must be at least five feet or nearly two metres
high.
There must be no holes low down because goats can easily get down on
their
knees and walk between loose wires low down in a fence. To keep does
inside,
a fence must be at least four feet or 120 cm high. If you wish to keep
a billy and a doe, then there should be two yards, one for the billy
with
a high fence and one for the doe with a lower fence.
9.0
When
the goats arrive
If the goats are two small kids, keep quiet so as not to frighten the
kids. The kids must also be
handled
gently. The kids should be fed with milk as soon as possible after
arrival.
If the goats are adult, tie the male goat or billy to a tree before you
let pupils go near him. Billy goats can be quite dangerous to children,
so be careful with them. This is a good opportunity to show the
parts of the body in the goat. Spend a long time looking at
the head to see the scent glands, ears, horns, teeth etc.
10.0
Behaviour of goats
See diagram 57.10: Forcing a goat, A flock
queen
inspects a strange plant,
One of the best ways of getting to know about goats is to learn
something
about their behaviour, that means, the kinds of things goats do. There
is also a lot the pupils can find out
just by watching goats.
Goats are family animals, they like to live together in groups. They
do not like being alone. So it is cruel to keep just one goat by
itself.
It will be very unhappy.
Goats are also easily upset by people who rush at them or push them.
They like quietness.
Moving goats from one place to another upsets them. When they are
upset,
goats go off their food and do not eat much food, or make much milk.
As soon as goats are brought together as a group, they form a social
order. That means they will fight among each other to find out which
one is the
leader or boss and which ones come next right through the group. The
does and the billy goats form different social orders. If a group of
goats
go wild and live in the bush, there will be two leaders in that group:
1. The king billy is the leader of the male billy goats. He usually
walks along in front of the flock with the flock queen near him. He is
ready to guard the
flock. He is always ready to fight dogs or other male goats or any
animals that may hurt the group.
2. The other leader is the oldest leader of the does. She is the top
of the female social order. She is called the "flock queen" because she
always helps to
lead the whole flock of goats to new places for feeding each day. If
she comes to some new plant, she stops suddenly with her front feet
propped
stiffly in front of her. She goes up to the new food and takes a leaf
in
her mouth. If she doesn't like it she spits the leaf out and then tries
to scratch of the plant by stamping on it. None of the other goats will
eat that plant. However, if she likes this food, she chews it up and
eats
more
leaves. Then all the other goats will copy her. They too will eat this
food.
However, they will not eat any of this new plant until the flock queen
tells
them it is good food. When an enemy frightens a flock of goats, they
scatter.
They do not all run together in one direction as cattle may do. If the
ground is uneven, goats always expect enemies to come from below them.
They feel that there is always safety above them. So if an animal gives
goats a fright, they will usually run straight up to the highest part
of
the land. Goats cannot be driven as other animals can. If you try to
drive
them to go in one direction, they will probably scatter. The best way
to
manage them is to try to be quiet and friendly with them and try to
lead
them in the way you want them to go. Because goats are family animals,
they can accept a man as one of them. This can happen in two ways:
a. If a man milks the does each day, then he will be taking the place
of a kid and will be accepted by the does.
b. If a man sometimes forces goats to go to a particular place, he
will be accepted because he is taking the place of the billy goat.
If there are several billy goats in a group or flock, they will fight
until one is found to be the "boss" or King billy of that group. This
billy
can be a nuisance, because he may try to chase away people, and he may
attack children. If this happens, there is only one way of stopping it
and that is that a man must go into the yard and meet the billy. He
must
take the billy by the ear and the tail and force them together. This
will
force the body of the billy to bend round in a half circle.
It may be possible from this position to push the billy down onto the
ground and to push his nose into the ground. This treatment shows the
billy
that the man is his boss, and he will usually stop his attacks on
people.
ne thing that billy goats do may not be liked by people, but is quite
natural
for the billy goats to do it. When billy goats come into the mating
season,
they like to spray themselves with their own urine. This makes them
smell
a lot. They do it because the smell attracts the females and makes them
come on heat. However, this is not liked by people. All
animals
have their own way of acting or doing things.
11.0
Caring for goats
11.1 Castration
See diagram 57.11.1: Two methods of
castration
Castration: When only one male is needed for breeding, young male kids
are usually castrated. This stops them fighting with other males and
they
grow more quickly. Castrate between 4 and 5 weeks of age. They soon
recover
from the operation.
There are two ways of doing castration:
a. One way is to use strong rubber rings that are used for castrating
sheep. The rings are placed high up around the stalk of the scrotum.
This
stops blood going down to the testes and they soon die and drop off.
This
only hurts the kid for a short while. It is probably the best way of
castrating
kids because there is no blood and it doesn't look so bad.
b. The other way is to get a sharp knife, and some antiseptic fluid,
e.g. Dettol. Hold the kid with its back resting on the top of a fence
or
a gate. Hold the back legs very firmly. Cut off the tip of the scrotum
or sac. Then squeeze out the testes one by one. Use the knife to scrape
down across the cords which hold them. Do not cut straight across the
cords
because they bleed more. After removing both testes, use a clean
cloth to put antiseptic solution on the cut tip of the scrotum. The kid
will bleed for about 3 or 4 minutes but this will then stop.
11.2 Paring the hooves
As a goat grows, the hooves on its feet also grow. If the goat has
some rough rocky ground to walk over, the hooves will probably be worn
away just as fast as they grow out of the foot. So they do not get too
long. However, if the goat only has very soft grass or ground to walk
on,
then
the hooves may grow too long. Unless they are trimmed or pared or cut
off
shorter, they may grow so long that it stops the goat walking properly.
To do the paring, catch the goat and lie it on the ground. Use a sharp
knife to cut off the long part of each hoof until it is the proper
length.
Do not try to do this all at once. It may be necessary to cut the hoof
away a little at a time until it is the right length. However, be very
careful
to make the two half hooves the same length. If you make a mistake and
cut off too much, you may cut the growing part and make it bleed.
If
this happens, be sure to put some antiseptic, e.g. Dettol, on the foot,
and
put the goat on some clean straw or grass in the goat house.
11.3 Tethering
Some people like to make sure that a goat does not run away,
so they tie it up to a tree or a fence post by a length of rope. Never
leave goats tied up like this overnight. It may be all right to do it
for
a short time in the day. Never tie a goat up and then go away and leave
it for a long time. Go out and see it to make sure that it has not
become
tangled up in the rope, unable to move or feed, or has been attacked by
dogs. You may need to move the goat from time to time because goats
will
not eat grass that has been soiled by urine or droppings. Be especially
careful to watch the goat if there are dogs nearby. Dogs can easily
worry
a goat and bite it because when it is tethered by a rope it cannot get
away.
11.4 Drenching
When a goat gets a lot of worms inside it, it becomes sick and may
not want to walk about much or eat food. Sometimes you know a goat has
too
many worms because you can see the worms in the droppings. Other worms
may
be there but are too small to see them in the droppings. To kill the
worms
inside the goat you have to give it some worm medicine. This is called
drenching
the goat.
To do this you need
1. A small bottle with a long neck.
Olive
oil bottles or drink bottles may be suitable.
2. A small amount
of blue stone (copper (II) sulfate crystals). Put one teaspoon of this
blue
chemical into 0.5 litres of water. Then you can use a little of this
for
the
goat. Give the goat a little of this solution first. What this does
is that it closes a tube which might let the worm medicine go into the
large first stomach or rumen. Here it would get mixed with so much food
that it would be weakened and unable to kill the worms. However, if you
first
give some copper (II) sulfate, it closes the opening into the rumen.
Then
the
worm medicine goes straight into the proper stomach.
3. The worm
medicine
that you will give the goat. If you read on the label of the bottle or
tin, you will see how much of this medicine to give the goat, but it is
not very much. One of the best worm medicines is one called Nilverm.
Another
good one is Wormguard.
4. Drench the goat as follows:
Put your left thumb inside the mouth and put the fingers of the left
hand underneath the lower jaw of the goat. Put the right amount of the
drench into a bottle and push the mouth of the bottle into the right
side
of the mouth. Tip up the bottle and let the worm medicine go in slowly,
a little at a time. If the goat coughs while this is being done, it
means
that some of the drench has gone into the wrong place into the
windpipe.
Change the position of the bottle.
11.5 Dehorning
See diagram 57.11.5: Disbudding
Sometimes people like to take off the horns of goats, because this
makes them less dangerous to handle. However, in schools it might be a
good
idea not to do this. If it is to be done, dehorning is best done in
male kids before they are 7 days old, and in female kids before they
are
10 days old. At this time the horns have not grown but the horn buds
are
there.
You can use two methods:
1. Slightly moisten some caustic
potash (potassium hydroxide). Then spread some of the moistened
caustic
potash right over the horn bud which will later turn into a horn. This
substance burns the horn bud and soon the horn bud is destroyed. The
horn
will not grow in that place.
2. Use a hot iron which has a circular
end.
This is heated on a fire and then pushed down onto the horn bud and
held
there for a few seconds, until the whole area is burnt on both sides.
It
is good if the iron can also bring away the yellow musk forming skin.
Do
not leave the hot iron on the horn bud too long, because the heat may
injure
the brain. If there is no proper disbudding iron, one can be made by
welding
a one inch steel nut onto the end of a rod of steel or iron. The scab
that
forms over the place where the iron has burnt out the horn bud, lifts
off
after 5 or 6 weeks and does not leave a big scar.
11.6 Deodorising
See diagram 57.11.6: Deodorizing a kid
Some goats have very active musk or scent glands at the base of the
horns. The smell made by these glands can often affect the taste of the
milk. Glands are present in both females and males, but are not usually
active in the female. The male has the habit of rubbing his head on the
does and leaving them with his smell. If the goat has been dehorned,
the
glands are in the position where they would be if the horns were still
there. The simplest way to remove these glands is to burn them away
with
a dehorning iron or a similar piece of iron. Apply a hot iron to the
area
where the musk glands are located. The iron must not be left on too
long,
but just long enough to scorch the gland area to a bone like
appearance.
Great care is needed not to burn the area of skin between the horns,
because
if this is done, the healing will be very slow.
11.7 Weaning:
There comes a time when all young goats must be weaned, that is to
say, they must be taken away from their mothers. It also means that the
kids must learn to eat plant foods like leaves and learn to drink less
milk. However, there are some important things you must know about
weaning:
When a kid is taken from its mother, it should still be able to see
her.
If this is not done, the kid will make too much noise calling for its
mother.
Goats can be weaned at early ages but they still need some milk until
they
are 3 months old. At the age of two weeks kids should be given a box
containing
some clean soil or am in mineral lick. If this not done the kid will
try
to get some iron and copper by eating some soil outside the house. This
soil may also have some eggs of a bad tape worm which may make it sick.
The kid of two weeks of age will also want to eat a little dry plant
food
like hay. So it is a good idea to cut some green grass and leave it in
the sun until it is dry. Then put it into the kid's house on the floor.
It is important
to have some practice in drenching because this is usually
needed for all goats.
12.0
Feeding goats
Diagram 57.12: Stomachs of a day old kid and 3
months old kid fed on fibre
12.1 Food needs of kids
Until they are 3 months of age, kids must be given some milk each day.
They should have proper milk at first, but after they are 4 weeks of
age
milk made from powdered milk can be used instead of proper milk. You do
not have to worry about what are the food needs of kids because milk is
a perfect food and contains everything the kid needs. This is
especially
true of proper milk from a cow or a doe. A kid needs about 4 pints of
milk
(or 2 litres) a day in four feeds. Billy kids may need an additional
pint
or half a litre per day. If you keep feeding a kid on milk only, the
milk
will go into its 4th or proper stomach. However, the first stomach or
rumen,
which can digest leaves, will not grow properly. In order to make the
rumen
grow properly the kid must be given some fibre us foods like tough
leaves
and dry grass or hay. The kid must also be given some of the chewed
food
which a doe has brought up from her rumen for chewing. This food will
put
into the rumen of the kid the microbes which it will need when the
rumen
starts to digest foods.
Feed needs of a 25 - 30 kg tropical goat per day
Starch equivalent 0.4 kg
Protein equivalent 0.02 kg
Dry matter capacity 1.1 kg
However, goats survive well on ordinary grasses but must have clean water.
12.2 Food needs of adult goats
They need four kinds of foods: energy foods, protein foods, minerals,
vitamins.
12.2.1 Energy foods
Goats need energy foods for maintenance and production.
1. Maintenance
Goats need 9 pound of starch equivalent for every 100 pounds of body
weight.
2. Production
Goats need 1.4 kg of starch equivalent for every
gallon
of milk produced. A starch equivalent is the amount of a food which is
equal to the energy contained in one pound of pure starch. So an
average
goat might need about 1.8 kg of starch equivalent per day.
Starch equivalents of some common foods (S.E.)
wheat grain 72
young green grass 70
fully grown grass 40
old dry plants 10
So the energy in 70 kg of starch equals the energy in 100 kg of green
grass.
So the energy in 1 kg of starch equals the energy in 70 = 1.4 kg of
green grass.
So a goat needing 4 kg of starch equivalent each day can get it by
eating 1.4 x 4 = 5.6 kg of dry matter in green grass. However, you have
to
multiply
this by 5 or 6 because of the water in green grass. So this goat needs
5.6 x 5 = 28 kgs of green grass each day. it would also need 50 kg of
fully
grown grass each day.
12.2.2 Protein foods
Goats need some protein for maintenance and some protein
for producing milk.
For maintenance they need one part of protein to every 10 parts of
starch equivalents of energy food. For producing milk they need half a
pound of
protein for every gallon of milk they make. Most legumes and some weeds
contain about 20% protein, so it would not be hard for a
goat
to get
the amount of protein it needs each day.
12.2.3 Minerals
Goats have a high need for minerals, especially these:
Salt: Goats need a lot of salt. They may get enough of this if they
live near the sea and eat leaves that have sea spray blown onto them.
If
goats do not
get enough salt they can be given salt licks or boxes that contain
solid salt.
Calcium and phosphorus are both needed by goats for making bone and
for forming milk. In
most green leaves there is enough calcium to balance the phosphorus,
but there may be a
shortage of phosphorus in the soils. It may be necessary to put some
superphosphate on the
local soils or put a little bone meal into the feed for the goats. Sometimes there is not enough cobalt in the local soils. If
this is so, stir one ounce of cobalt sulfate into half a pint of water
and use this to wet 3 kg of salt. let this dry and then let goats lick
it.
12.2.4 Vitamins
These are substances needed in small amounts by all animals.
Vitamin A is needed for health but it is contained in green leaves.
Also
goats
can store Vitamin A in their livers. Goats usually get enough
Vitamin A. The B vitamins are also needed, but these are made for the
goat by the microbes living in its intestine. Other vitamins are not
usually
needed
by goats.
13.0
Breeding goats
Male goats (billy kids) may be ready to mate when they are only
45 months old. The does are able to mate a little later, between 41/2
and
6 months of age. However, it is very important not to let the does mate
until
they are 910 months old. At this age they have grown a big enough body.
If you want to stop the does from mating too soon, you must keep the
billy
away from them.
When is a doe ready? A doe will not mate at any time. She only mates
when she is in "heat". It is very easy to tell when the doe wants to
mate.
She wags her tail a lot and calls out. Also there is a water discharge
from her birth canal. The period of heat lasts 13 days, but many does
have
another heat 78 days later. However, the usual cycle is periods of heat
21
days
apart. It is best to mate the doe towards the end of her heat period,
because
this is when the egg comes down.
The average gestation period is 155 days. The first heat (oestrus)
after birth of young is 1 to 3 months, then the 21 days cycle. for 1 to
3 days. The lactation period varies according to living conditions.
Multiple births are less common in goats used in tropical areas
compared to European breeds.
13.1 Choosing mates
It is best to mate a good doe to a good billy goat (male goat). It is
very wise to use
only billy goats that have horns. However, it may not be possible to
get a billy
goat with horns in the Anglonubian breed. Then there will be few
intersex
kids
born that are no use and have to be destroyed at birth. Gestation is
the
length of time between mating and when the kid is born. In goats this
period
is 146 days near enough to 5 months.
13.2 Kidding
Does which have been mated and which are coming close to kidding must
be given good food. They need some food rich in protein, such as
legumes,
and they also need a teaspoon of bone meal every day. Then the kids
will
be strong and the doe will have a lot of milk for them. As soon as the
kids are born some of them may have to be destroyed. If the goats are
being
used to produce milk, then the male kids may not be needed and they may
be destroyed at birth. In goats twins are common. If twins are born, it
is important to look at them closely, especially the females. If any of
these are not proper males or proper females but are a mixture of these
two, then they should be destroyed because they cannot breed. Most kids
weigh about 7 pounds or nearly 3 kilos when they are born.
First life strong and healthy. It keeps disease away from them. If
the kid is very weak when it is born, the teacher may be able to hold
it
up to its mother and help
it to have some colostrum.
14
Diseases of goats
Diagram 57.14: Where to cut to treat bloat
14.1 Mastitis
This is a very bad disease and may infect any goat that is in milk.
It is a disease which attacks the milk making glands in the udder. The
signs of the disease are that the udder is swollen, hard, red and sore
and the goat gets a high temperature. One sign may be that the milk
contains
small pieces of a semisolid substance. This is pus coming from the
swollen
sore part inside the udder. Sometimes part of the udder may go black
and
become dead. If this happens the goat may die quickly within 24 hours.
Another sign is that the goat may lie down and cry out. Mastitis must
be
treated quickly or you will lose the goat. These are treatments: 1.
Keep
the goat warm and give it 8 sulphamide tablets to swallow. 2. Give
the
goat large doses of Ampicillin or tetracycline. You will need an
officer
from the agriculture department or a doctor to help you do this.
14.2 Bloat
This is a disease that can happen suddenly to a goat if it eats a lot
of soft wet grass and herbs. It is caused by millions of bubbles in the
first stomach that cannot burst and form gas to be belched out. The
whole
rumen swells up and may kill the goat. Treatment is to give the goat
half
a pint of linseed oil. If the bloat is very bad, you may need to use a
knife to make a cut in the left side of the abdomen to let out the gas.
14.3 Worms
This is probably the commonest disease in goats.
Goats may be infected
with the following parasites:
1. Nasal bots which live in the nose,
2.
Large and small lung worms which live in the lungs,
3. Liver fluke
in
the liver,
4. Barber's pole worm which lives in the fourth stomach,
5.
Black scour worm which lives in the small intestines,
6. Nodule worm
which lives in the large intestine.
The commonest treatment for most
worms
is to give the goat a drench with Nilverm, Wormguard or some other worm
medicine. Ask the agriculture officer which medicine to use. Give the
goat
a little blue stone solution first.
14.4 Pregnancy toxaemia
This may be called "twin kid disease". It only affects does that are
carrying a big kid or twin kids. It only happens if the doe is not
getting
enough good food and enough exercise. This makes a big strain on the
doe
and her body may use up some of the fat to make enough food for the
kids. However, the fats may also be turned into some poisonous
substances that
make
the doe sick. The pregnant doe becomes sick 4 weeks before they are due
to give birth. Treat the doe with exercise, a diet of shrubs and legume
plants, Vitamin A and Vitamin D supplements, and a
drenching
with glycerine.
14.5 Foot rot
Some goats get a bad germ coming into the soft part of their feet.
It rots this soft part, makes a bad smell, and makes the goat very
lame.
Use a knife to cut away the loose horn on the hoof. Soak the
goat's
foot in antiseptic solution. If a goat gets this disease she will
probably
spread the germs over the grass where she has been walking. So you must
watch other goats carefully to see if they get sore feet.
14.6 Food poisoning, enterotoxaemia
Goats can get sick because they have eaten too much of one kind of
food. There are some microbes that always live in the intestine, but
they
do not grow too fast and cause trouble because the food passes down the
intestine quickly. However, sometimes if a goat eats too much of a soft
green
food, the food may not pass quickly enough along the intestine. Then
these
microbes grow very quickly and make a poison. The goat will stagger
about
and lose control of its movements. It will lie down and struggle, but
first
it gets diarrhoea and makes lots of runny manure. The goat will die
unless
it is treated. Treatment is to inject pulpy kidney serum. Kids can be
protected
from this disease if they are injected with a pulpy kidney vaccine when
they are young.
14.7 Milk fever:
his disease sometimes affects goats which are close to kidding or have
just kidded. The goats that are most affected are usually ones that
have
a lot of milk in the udder. Affected goats lie down and gasp for
breath.
The best treatment is to give the goat an injection of calcium
borogluconate
into a vein. The agriculture department may have some of this substance
you could use.
15.0 Milking goats
See diagram 57.15: Milking platform for goats
After a doe has given birth to a kid or twins, the young goats must
be left with the mother for two or three weeks. The very first milk or
colostrum is especially important for the kids. After this time the
kids
may be taken away from the mother and reared on milk or milk substitute
given to them from a bottle. Then the mother may be milked and the milk
used as food in the home or sold. Because goats are so close to the
ground,
a special milking platform must be made for them. This place must have
some bails at the front so that the goats head can be kept still. It is
a good idea to have a small tray in front of the head bails so that the
goat can eat while she is being milked. This helps to make her quiet.
It
is usually best to milk the goat from the right hand side. A clean wet
cloth should be used to wash the udder. Mud and dust must be removed
before
milking. Also rubbing the udder for 30 seconds or a minute is good
because
it causes the goat to let her milk come down into the udder. The
milking
should be done as quickly as possible. It is best to milk does at
exactly
the same times each day. Milking twice a day is better than once.
16.0 Post-mortem, digestive organs
See diagram 57.16.1 Killing a goat and
hanging it
up for post-mortem | See diagram 57.16.2:
Digestive system of the
goat
16.1 If a goat has been grown for meat, look at its organs
after it has been killed. The best way to kill the goat is to push it
onto
its side and then kneel on its side. Then a long sharp knife is used to
cut the throat and let all the blood drain out of the body. The head
must
be bent backwards before the throat is cut. After killing the goat may
be hung up by the back legs and skinned. Then it may be possible to dry
the skin in the sun and sell it later.
In taking out the digestive organs, cut a large hole in the abdomen
and pull out all the organs onto the ground. Find the food tube which
leads
through the chest into the first stomach, tie a piece of string around
it and then cut it off. Also tie a bit of string around the last part
of
the intestine and cut it off too. Lift all the digestive organs onto a
clean grassy place and look at these parts:
16.2 The rumen is the very large "first stomach". When the goat
eats some
leaves, they frrst chewed to a rounded lump, a bolus. The bolus is
swallowed down into the
rumen where bacterial fermentation ocuurs and some nutients are
absorbed. Later on the goat will regurgitate some food form the rumne
and chew it again as the cud. This process is called rumination. When
the food is chewed the
second time, it is in very small pieces. Also it is mixed with a lot of
saliva from the mouth, so it is very runny. Cut open the rumen and tip
out the contents. Find some food in big
pieces
not yet chewed, and some of the food that has been chewed a second
time. The goat has a large rumen where it can store bulky plant
material that
can be attacked by the microbes.
16.3 The "second stomach", the reticulum, is smalleer trhan the
rumen and its lining has a honey comb appearance. Here foreign obects
swallowed during feeding arte separated from the food.
16.3 The
"third stomach", the omasum, called the Bible or book, has a lining
folded into pages for removal of water and some fatty acids. It is
quite small. When it
is cut open it can be seen that it contains many flat leaves. Here the
food is fairly dry, and not wet and runny like the food
in
the rumen.
16.4 The "fourth stomach", the abomasum or "true stomach" is similar to
the stomachs of non-herbivores, e.g. cat, dog and hunan. It contains
glands in the wallth at secrete hydrochloric acid as gastric juice that
makes the
food
wet and "runny" again, kills and digest bacteria, and digests food by
acid hydrolysis.
16.5 The food remaining in the abomasum passes through a
thickened
valve into the duodenum. The duodenum is
a small sized tube about 25 cm long. When the liquid food goes through
it, the food receives digestive juices from two organs:
1. The pink
pancreas
puts some strong digestive juices into the food.
2. The liver makes
bile
which is stored in the green gall bladder and then put into the food as
it goes through the duodenum.
16.6 The small intestine: The food next goes into a very long tube
called
the small intestine. The digestive juices soften the food and digest
it.
Then the food can go through the walls of the small intestine and into
the blood. Then the food can be taken all around the body and given to
all the parts of the body. The caecum is a large bag at the end of the
small intestine. Some of the food which has not been digested goes into
this bag. Here there are many millions of microbes that digest a little
more of the solid food.
16.7 The large intestine consists of several
different
parts. Here water is taken out of the food until it becomes semisolid.
This is no longer useful to the animal and is made into little lumps
called
faeces or the manure. It then passes out of the anus.
17.0 Reproductive organs
See diagram 57.17: Male and female reproductive
organs
You can see organs after you remove the digestive organs.
17.1 Male organs
The most important of the male organs are the testes which are found
in a sac called the scrotum outside the body. Open the scrotum and
notice
these things about the testis: 1. It is supplied with blood by a very
twisted artery which lies in the stalk of the testis. As blood comes
the
long way down this artery it loses heat and gets cooler. The testis
needs
cool blood to grow properly. 2. If a cut is made across the
testis
it can be seen that it contains separate divisions. The
male
cells or sperms are made in these divisions. 3. The sperms made in
the
testis pass into a long sperm tube, and the top end of this tube lies
over
the top end of the testis. It goes down the side, turns and then passes
up in the stalk and takes the sperms into the body. The sperm tubes
join
together in the body and join with the water tube near the bladder.
However,
the sperms go through a gland which puts a fluid with them. This fluid
makes the sperms swim. Then when they are needed the sperms go down
along
the water tube (or urethra) through the penis and then into the female.
17.2 Female organs
The most important of the female organs are the two small ovaries.
The eggs are made in these ovaries. When the eggs are made by the
ovaries,
they are set free in the abdomen. They find their way to the openings
in
the end of two long twisted tubes. These tubes lead down on each side
to
a strong muscular organ called the uterus. This is where the young
animals
are made. At the end of the uterus is a very narrow hole which leads
out
into the vagina or birth canal.
At mating, sperms from the male are placed in the upper end of the
vagina. The muscles in the walls of the female organs take the male
fluid
and the sperms up through the uterus and into the tubes at the sides of
the uterus. Here the sperms meet the egg or eggs. When a sperm has
joined
to an egg and fertilized it, this egg moves down into the uterus. It
sinks
into the wall of the uterus and begins to turn into a kid.
History
The contents of this page were written by Dr J. Elfick in the Solomon
Islands for the Pacific Islands Agricultural Curriculum Development
Project funded by the Australian Development Assistance Bureau