Scott Bilney


A solid effort Scott. Your embryo development and egg processing section include good detail. The same detail would have been good in the Layer Chicken breeds and fertilisation sections. Grade = B

Embryo Development

The chicken egg takes 21 days to develop inside the chicken before the egg come out of the chicken

1-4:

The brain and main parts of body are being formed the heart is starting to form.

The tongue and beak begin to form, the tail has appeared and wing and leg buds are visible

5-8:

body is forming,A row of feather germs appears on the tail.The sclera of the eye begins to form.Feather papillae appear on the thigh.The leg bends at the knee.

9-12:

Blood begins to circulate,Claws begin to form. The comb is visible. Flight feathers appear. Feather tracts appear over the sternum. ...

Scales appear on the lower legs.

12-16:

The embryo turns its head toward the blunt end of the egg.The scales, claws, and beak are becoming firm

16-19:

The beak turns towards the air cell.The yolk sac begins to enter the body cavity.

The lungs begin to function.


19-21:

yolk sac completely drawn into body cavity; embryo occupies practically all the space within the egg except the air cell.Fully developed and ready to be born


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Egg Fertilisation

A female chicken fertilises her eggs by mating with a male chicken. the rooster the hen takes 21 days for the whole process and only 12 days for the Hen to lay its egg after going through the 21 day cycle of creating the egg.


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Layer Chicken Breeds



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Incubation

an incubator is a machine that keeps eggs in it at the same temperature it would be under the chicken to simulate the egg being under the chicken and so the chicken can be born. It develops the chicken embryo because it simulates what it would be like if a chicken was sitting on it so the egg thinks its under the chicken.the conditions inside the incubator are, the temperature at 12.1 degrees centigrade with 75% humidity .the conditions are important so the chicken inside can have the right temperature to grow.


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Preparing eggs for Sale

Receival:

refrigerated trucks deliver eggs from the egg farms to grading floors for quality testing. they are taken to large temperature and humidity controlled rooms,this keeps the eggs fresh. they are then put on conveyer belt and cleaned.

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Re-Oiling:

The cleaning removes dirt or natural oils, then is sent through a re-oiling station where fine mist of oil re coats the clean egg.


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Quality testing:

To ensure best quality the eggs are tested for egg white height,yolk colour and shell thickness.

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Candling:

those eggs that are left on the conveyer belt are passed over light so the operator can see inside the egg and look for eternal defects, such as blod spots and shell defects

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Stamping:

This is where they stamp the eggs with a unique code detailing the farm of origin and the day the egg was processed.

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Grading:

Eggs are weighed and sorted into different sizes, grade sizes vary between egg .

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Packing:

the eggs are placed into cartons and a use by date is placed on cartons. then are packaged into trucks and placed in supermarkets.


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Lice & Mites


Mites: Mites are smaller then lice they are also wingless and feed on chicken blood.

Lice: are small wingless insects that feed on dry skin, scabs and feather parts

Symptoms:Symptoms are decreased egg production, decreased weight gain, more vulnerable to diseases.

Treatments: pesticides to treat lice and mites are available in dusts, wettable powders, liquid sprays and resin strips.
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