1. Eliminated according to appearance characteristics. There are two main characteristics of the appearance of low-yielding chickens: First, the body is thick, the head is thick, and the individual has too much fat. Second, the body is weak, the head is smaller, and the weight is lighter. The best time to eliminate these chickens is before the end of the breeding period. 2. Eliminated according to quality characteristics. The low-yielding chicken's cocks and fleas are rough and cool, and the abdomen lacks elasticity. The cloaccus can hold 1 to 1.5 fingers and is tight and dry. The best time to eliminate these chickens is at the end of the high yield period. 3. Eliminated according to the moult status. Normal moulting is very regular, in the order of head → neck → chest → back → wing → tail, with 10 main wing feathers and 17 to 18 secondary feathers. Low-yielding chickens have early metamorphic feathers and early production discontinuation. They have long time for main feathers, and they only change one or two for one time. The elimination of these chickens should be carried out at the end of the laying period and when it is planned to keep high-yielding chickens.
Agrostis Stolonifera,Astragalus Sinicus,Vicia Villosa,Agropyron Cristatum
Chengdu Lv Mu Tian Xia Agricultural Technology Co. LTD , http://www.cdlmtx.com