In order to maintain the longevity of high-yield breeding hens and maximize the yield of qualified eggs, it is necessary to reduce the material after the peak. If the breeder's feed intake exceeds the required amount, it can continue to gain weight through fat deposition. Fat deposition rate is a key factor affecting egg production rate and fertilization rate after peak period, so the amount of feed should be adjusted according to changes in body weight and egg production rate to adjust the deposition rate of fat. The exact time for breeding a breeder's chickens should depend on the growing history of the flock and the condition of the flock. The first reduction of the chickens with high egg production rate should not be earlier than 34 weeks, and the reduction should be carried out step by step. After the peak of egg production, there is a plan to reduce the amount of feed, so that the weekly weight gain of the flock is stably maintained at 15-20 g, so that a good egg production rate, fertilization rate, hatching rate, and egg weight can be maintained. Weekly analysis should be based on data such as weight, egg weight, feeding time, number of eggs per day, and status of the flock. The amount of feed should be determined and adjusted according to changes in ambient temperature in the house. The total material loss is about 8%-12% of the peak material quantity. The principle of material reduction: first fast and slow, one week reduction 0.5-1 g/only.
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