In order to increase the laying rate of laying hens and increase the economic efficiency of raising chickens, low-laying hens are generally eliminated at the later stage of egg laying (after 300 days of age) in order to achieve the purpose of reducing costs and improving efficiency. The following are ten suggestions for eliminating low-laying hens: 1. Identify high-yielding chickens from chicken cocks: red, large, soft, delicate, with temperature, inverted side, normal red. Low-producing chickens, even those that do not produce eggs: Chicken cocks do not fall, white spots or white frosts, and crowns are thin; in the case of Marek's disease, chicken crowns shrink, no temperature, cool crown; if there are purple crown, black crown chickens To be eliminated in time. 2. Identify from leg mouth (yellow legs and yellow mouth before laying eggs) High-yielding chickens: The higher the rate of fading, the higher the laying rate, and the 250-300-day-old is still yellow-legged, yellow-mouthed, or even low-yielding. Not laying hens. The chicken breed is a chicken leg with a white shell and the mouth is yellow. The chicken breed is a brownish-yellow chicken leg with a pink shell. 3, from the feathers to identify high-yielding chicken: Feather soil color, unkempt, not shiny, not smooth, neck, back, chest, feathers, or loss of light for the high-yield chicken, such as sterilized chicken, and often dressed in hair, Such chickens are low-yielding chickens. 4, from the anus to identify the relaxation of the anal sphincter muscle, elastic contraction around the flexor muscle, there is a sense of moisture, and immediately contraction, out of viscous secretions, such chickens as 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. 5. When feeding is discriminated from the feeding conditions, high-yielding chickens, such as hungry tigers, eat, gorge, and have a strong appetite. When they eat, they do not look up, picky eaters, and eat quickly. Picky eaters do not like to eat, even the feed, chopped into a pile of not eat, but also a waste of feed chickens for low-yield chickens, and even do not produce eggs. 6, from the feces to identify high-yield chicken manure formation, the shape of a small head with white, drink more in summer, but also basic shape, normal color. Low-producing chickens and non-laying hens have slender feces and dry feces. 7. Distinguish from the pubic bones (touching and licking) High-yielding chickens, pubic 3-4 fingers. Low-producing chicken pubic bone 2 refers to even 1 finger. 8, identify high-yielding chicken from the abdomen, abdomen wide. The low-yielding chicken has a narrow, thin, thin sternum with a sharp blade. 9. Distinguish the high-yielding chickens from the chickens' cries: The calls are loud and tidy and uniform, indicating that large groups of chickens 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 small animals are found in chicken farms, they immediately scream and cause large groups to frighten and produce soft eggs. 10, the chicken thief's identification to deal with stealing chicken, or only the upper cage chicken caged eggs, can be transferred to the upper cage. Chickens that use ticks with necks should be eliminated or put into single cages, cut off the cages, and allow the eggs to roll to the ground (place some earth on the ground so that the eggs are not broken). For the non-laying chickens, seven-day counting can also be used. The above ten recommendations generally meet two or more may be low-laying layer. (Sun Haili, Agricultural Technology Consulting Service Center, Sanmenxia City, Henan Province
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