This identifies breeders

Looking at chickens with chickens that have lost production due to reduced secretion of sex hormones, their crowns are atrophic, dry, rough, and low in elasticity; chickens that are not productive are large in size, moist, smooth and elastic.

Look at the feathers and spread the chicken wings. There is a short feather at the elbow. There are ten main wing feathers on the wing end. If some of them are replaced with new feathers, the chicken has been abandoned.

After watching the chickens, the pubic bones of the chickens were thick and curved, and the posterior convulsions were no more than two fingers. The unpublished chickens had thin and straight pubic bones, and the posterior convulsions were usually more than two fingers.

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