Keeping hens before they are open is very important for improving the production performance of chickens. Therefore, it must not be taken lightly. First, timely bred chickens should be transferred into laying hen houses from 17 to 18 weeks old, no later than two weeks before the start of production. When selecting a group, you should choose sunny days, summer should be selected sooner or later, and winter should be transferred in the afternoon. During the group operation, especially when catching chickens, it should be stable, accurate, and fast. Do not resort to brutal measures to eliminate and reduce various stress factors as much as possible. Second, the replacement of laying hens The dietary broilers transferred to the laying hen house, still fed chicken bred diet, but later need to gradually limit the feeding of broiler chicken to free feed, from 20--21 weeks of age Into a layer hen diet to meet its egg production needs. Third, prevent laying hens From fattening to egg-laying stage, if only pay attention to increase the amount of feeding, and ignore the increase in light, it will lead to layer fat, affecting their ability to lay eggs. On the contrary, only paying attention to increasing the light without increasing the amount of feed, the chicken can not reach the nutritional level of the laying eggs, and it can never produce more eggs. Therefore, before the laying hens are laid, it is necessary to increase the coordination of light and feed and not to waste. Fourth, adjust the light time Spring chicks change the light time more at the beginning of 18 - 20 weeks of age, increase the light time of 15 - 30 minutes per week, until the laying hens to 14 - 16 hours of constant light so far. If there is insufficient light, add artificial light. Fifth, control the production time of laying hens The length of light can control the chicken's opening time, laying hens should be controlled at 150 days of production. If the production is premature, it is prone to dysfunction, abnormal eggs, abnormal eggs, and even lead to rectal prolapse. In addition, due to premature production, not only the production of eggs is small, but also takes a long time to return to normal. However, the excessive delay in the opening period will also lead to a decline in the level of production and a reduction in the benefits. Sixth, pay attention to calcium supplementation required for calcium chickens to increase production, especially high-yielding chickens, calcium deficiency is easy to produce soft-egg eggs or the appearance of cartilage disease, rickets and so on. Therefore, it is better to place shellfish powder, lime powder, natural gypsum and Other mineral feed troughs separately in the chicken house or sports ground one week before the start of production, and allow any chicken to eat freely.
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