What is used to judge the age of a chicken?

1. Chicken's age can usually be identified by the following seven points: first, mouth nail, second, nasal tumor, third, toe, fourth, foot pad, fifth, feather, sixth, bare skin and seventh, bursa on cavity.

2, look at the mouth nail: the chicken's mouth nail is thin, the corners on both sides are narrow and thin, and there is no scab. Chickens that have been kept for more than a year have scabbed a little. Adult chicken's carapace is short and thick, with hard and smooth ends, wide and rough corners on both sides and large scabs.

3, look at the nasal tumor: the nasal tumor of the suckling chicken is ruddy, and the nasal tumor of the chicken is reddish and shiny. The nasal tumor of chickens for more than two years is fine pink in color, large and soft, moist and shiny. Chicken nasal tumor over four or five years old, pink and rough. ?

4, look at the toes: chicken feet are tender, scales are soft and thin, scales are not obvious, the color is bright red, toenails are soft and pointed, and the texture is soft. Adult chicken feet are thick, scales are thick and hard, scales are clear and crimson, and toenails are hard and curved. ?

5, look at the foot pad: the chicken foot pad is thin and soft; Adult chicken feet are thick, hard, rough and dark in color. ?

6, look at the feathers: the main wing of the chicken can be used to identify the age of the chicks. There are 10 feathers on the main wing of chicken. Replace the first feather when you are two months old, and then replace 1 feather every 13 days to 16 days. When the last feather is replaced, the chicken is about 6 months old and mature, so it can start pairing production.

There are 12 feathers on the auxiliary wing of chicken, which can be used to identify the age of adult chicken. The auxiliary main wing feathers are replaced 1 from inside to outside every year, and the replaced feathers are slightly darker and cleaner. ?

7. Look at bare skin: The more wrinkles in the bare skin of chicken eyes, the older they get. ?

8. Look at the bursa of fabricius in the cavity: identify the age of the chicken from the size and presence of bursa of fabricius in the chicken cavity. The bursa of fabricius of chicks is located above the reproductive cavity, and the bursa of fabricius of chicks is larger.

Reference source: personal library-the easiest way to judge the age of chickens

Extended data:

1. Chicken is a kind of poultry. Domestic chickens originated from wild chickens, and the domestication history was at least about 4000 years, but it was not until about 1800 that chickens and eggs became mass-produced commodities. The types of chickens are turkey, black-bone chicken, pheasant and so on. Moreover, chicken is also an animal sign in the 12 zodiac.

2. Chicken is delicious and nutritious. Most of the nutrients in chicken are protein and fat, but chicken lacks calcium, iron, carotene, thiamine, riboflavin, nicotinic acid, various vitamins and crude fiber. If you take chicken as the staple food for a long time and don't eat other fruits, vegetables and grains, it will easily lead to sub-health.

According to scientific investigation, eating chicken has a great influence on human health, especially on the health of the elderly and women.

Nutritionists point out that on average, the cholesterol content in chicken is the highest because people eat all kinds of foods a day. Cholesterol will greatly increase the risk of cardiovascular and cerebrovascular diseases. If the elderly and women eat chicken every day, there will be excess cholesterol in their bodies, which is not only harmful to health, but also increases the risk of heart disease and cerebral thrombosis.

In addition, some unscrupulous traders add hormones to chicken feed, which leads to hormone residues in chicken and will also affect human health. Eating chicken with hormones in pregnant women will lead to milk return and obesity; Underage can also lead to precocious puberty.