Winter chickens in ventilation at the same time, be careful not to cause hires temperature fluctuated, to prevent excessive temperature difference caused by the stress response caused by the disease, vents above the chicken back side 1.5 meters above the appropriate When the abrupt drop in temperatures, cold insulation work to keep up, often easy to make the broiler exogenous cold, characterized by coughing, sneezing, tracheal rales, dyspnea and other symptoms for respiratory diseases. Therefore, breeders should grasp the good climate change, good cold insulation work. Hen house to be repaired to prevent drafts, the drafts invasion of chickens. The plains reared broiler flocks to be thicker padding, use padding to increase the indoor temperature. Frequently changes the litter, noon windows open for ventilation. General, 6 days ventilation, and increased with age, increasing the ventilation rate, so that chickens have enough oxygen. 
 Cold winter weather, you can not ignore the ventilation to the chicken coop insulation on chickens excreted in the feces and wet litter is not removed, ammonia accumulation resulting in sheds, the concentration increases, resulting in broiler ammonia poisoning or lead to other diseases. In order to prevent the adverse effects of ammonia on broiler, it is recommended that the chicken farm (household) do a good job following the feeding and management work 
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