No sweat glands in chickens are prone to heat stress five key points of heat stress in layers in summer

Heat stress in laying hens means that when the temperature exceeds the upper limit of comfortable temperature, the temperature in the chicken body rises sharply and becomes dysfunctional. With the coming of summer, due to the high feeding density of laying hens and no sweat glands, the deep body temperature is high, if the external environmental temperature and humidity are too high, drinking water is insufficient, especially poor ventilation, it is difficult for chickens to dissipate heat, and heat stress is easy to occur. The performance of heat stress in laying hens is as follows: chicken spirit is depressed, body temperature rises, neck stretches and mouth opens to breathe, feed intake decreases, soft shell eggs and broken shell eggs increase, resulting in large economic losses. To prevent heat stress in laying hens, we should do the following:

Laying hens

First, reduce the feeding density: the laying hens themselves evenly spread the heat to the environment, and the lower density flocks help to reduce the heat burden. In summer, the flock density should be reduced to reduce heat stress.

Second, anti-stress drugs: at high temperature, adding 100mg vitamin C per kilogram of feed, adding 0.1% sodium bicarbonate to drinking water, or adding electrolytic multivitamin or bacitracin zinc, etc., have a good effect on the anti-heat stress of laying hens.

Third, the drinking water for laying hens should be sufficient and clean, and the water temperature should be as low as possible.

Fourth, strengthen ventilation and air flow rate. The flowing air can take away the thin layer of hot air near the laying hens, making the heat of the chicken body dissipate quickly. Fans or ceiling fans should be installed in the chicken house so that the air flow in the house is better. To this end, all ventilation equipment should be kept clean and in working condition. When it is cooler at night, keep the layers cool by continuous ventilation, which helps to compensate and stimulate the layers to feed the next day.

Fifth, strengthen feeding management: attention should be paid to hygiene, disinfection and epidemic prevention in summer. Immunization, conversion of laying hens and other work should also be concentrated in the morning or evening when the air is relatively cool, in order to reduce immunity, conversion and other additional stress.