In order to increase the egg production rate of laying hens, low-laying layer hens are generally eliminated after the peak period of laying hens, that is, after 300 days of age, in order to reduce costs and improve efficiency. Identifying low-laying hens can be considered from the following aspects:
The chicken crowns of high-yielding chickens are red, soft, delicate, and have a temperature, and they fall to one side. Low-yielding chickens that do not produce eggs will not stand upright, have white spots or white frost, and have thin crowns. If you have Marek's disease, the chicken's crown shrinks, there is no temperature, and the crown is cool. If there is a purple crown, black crown chicken to be eliminated in time.
Color chickens have yellow legs and yellow mouth before laying eggs. The higher the production rate of high-yielding chicken legs is, the higher the egg production rate is. Between 250 and 300 days of age, the yellow-legged and yellow-mouthed chickens are either low-producing or non-laying. Chickens that produce white shell eggs have yellow legs and mouths; chickens that produce pink shell eggs have brown legs and mouths.
Feather high-producing chicken feathers earthy, unkempt, not shiny, not smooth. High-yielding chickens with feathers that have fallen off the neck, back, and chest, often appear as hairless. Such chickens are low-yielding chickens.
The anal anal contractor muscles are loose, and the elasticity around the expansive contractor muscles is elastic, with a moist sensation, and they immediately contract and flow out of the sticky secretions. Such chickens are high-yielding chickens. There is no elasticity in the contraction of the anus and extrusion around the abdominal muscles, and there is no sense of moisture for the low-yielding chickens.
When feeding and feeding, high-yield chickens are hungry for food, gobble up, have a strong appetite, and do not look up, picky eaters, and eat quickly. Picky eaters don't like to eat or eat chickens that are not eaten as low or no laying hens.
The manure of high-yielding chicken manure is shaped into a small head with a white color. It drinks more water in the summer and is basically formed. The color is normal. Low-producing chickens and non-laying hens have slender feces and dry feces.
The pubic bone produces 3 to 4 pubic bones. Low-producing chicken pubic bone 2 fingers, even 1 finger.
The abdomen has a high yield and the abdomen is wide. The low-yielding chicken has a narrow, thin, thin sternum with a sharp blade.
The sound of laying hens is loud and uniform, indicating that laying hens are healthy. Chickens that do not produce eggs for a long period of time do not call or send whistles. When abnormal animals and other animals are found in chicken farms, they immediately scream and frighten chickens and produce soft eggs.
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