First, the main changes in the pre-opening hens: the group is only a great deal of stress on chickens, and some chickens have a nervous and weight loss after switching, and it usually takes several days to recover. Therefore, we should strive to minimize the stress of the transmigration and must be carried out at the appropriate time - the appropriate age. The specific methods and measures to reduce the stress of transfer group have been elaborated. Here only the main changes that occur in the body of the pre-laying hens that are related to nutrition are supplemented. Second, free access to modern laying hens requires high nutritional requirements for laying eggs. A new hen needs about 20 times more feed in the first egg production year. The feed intake of the young hens is fairly constant 1 month before they are put into production. It consumes about 75 grams per drink. Feed intake decreased by approximately 20% until about 4 days before the start of production, and low feed intake was maintained until egg production. Then, 4 days before the start of production, the feed intake increased rapidly, and afterwards, the medium speed increased until 4 weeks later and then slowly. Therefore, the hens should be allowed to feed freely when they start production and continue until the peak of the egg production period two weeks later. Third, the light: the principle of light during the production period can only be extended can not be reduced. Extending the duration of the light should be based on the measured body weight at the age of 18 or 20 weeks. If the chicken population reaches the standard, the light should be extended by 1 hour per week from the age of 18 or 20 weeks until it is constant at 14-16 hours. change. If the standard weight is still not reached at the age of 20 weeks, the supplemental illumination time may be postponed by one week later, that is, at the age of 21 weeks. Fourth, change the diet: from the growth of the diet for the production of egg diet, increase the time of light to increase production time to match the changes in the diet, such as only increase the light does not change the diet, easy to cause the reproductive system and the entire chicken body development Not coordinated. If only changing the diet does not increase the light, it will cause the body to accumulate fat, so it is generally replaced after changing the light for a week. 5. Calcium supplementation: The requirement for calcium in laying hens is 3 to 4 times more than that in growing chickens. Egg-laying diets generally contain 3% to 3.5% calcium, not more than 4%. The proper calcium supplement for laying hens should be noted: If you feed too much calcium to laying hens, it will not only suppress their appetite, but also affect the absorption of minerals such as phosphorus, iron, copper, cobalt, magnesium and zinc. At the same time, calcium can not be supplemented prematurely. This is because if the calcium content in the feed is small during the later growth period, the ability of the young hens to retain calcium is higher, and the amount of calcium required at this time is not large. The calcium method that can be adopted in practice is: when the chicken sees the first egg, or adds some shells or calcium carbonate particles to the feed two weeks before the start of the production, some minerals can also be put in the feeding trough. The chickens were allowed to feed freely until the chicken production rate reached 5%, and the growth feed was changed to egg production. Pulse Oximeter,Oxygen Concentrator,Fetal Doppler,Vet products,health care products home Anesthesia Medical Co., Ltd. , https://www.medicaldiverse.com