1.  Heat preservation and cold protection, can not forget the ventilation winter climate is cold, and the temperature needed in the house is very different from the outside temperature.  It is necessary to ventilate and ventilate, and to maintain the temperature in the house.  Chicken coop requires good cold performance to meet the requirements of winter heat preservation.  Strict prevention of chicks due to low temperature caused by crowding the phenomenon of death.  At the same time of ventilation, pay attention not to cause the temperature in the house is suddenly high and low, strictly prevent the stress reaction caused by the temperature difference is too large to cause disease, the vent is above the chicken back1.5 meters above the appropriate.  When the temperature drops rapidly and the cold preservation work can not keep up, it is often easy to make broilers suffer from cold, and respiratory diseases characterized by cough, sneezing, tracheal rales, dyspnea and other symptoms occur.  Therefore, the breeder should master the climate change, do a good job of cold insulation.  The chicken coop should be maintained well to prevent thieves and draught from invading the chickens.  Ground broiler flocks should be thickened with bedding, using bedding to raise indoor temperature.  To frequently change the pad material, open the window at noon ventilation.  In general, ventilation starts at 6 days of age and increases with age to increase the ventilation volume so that the flock has enough oxygen.

2.  Heat preservation dry, can not forget to exhaust ammonia winter climate is cold, can not give the chicken house heat preservation and ignore ventilation, the chicken excrement of feces and wet bedding material is not timely removed, resulting in the accumulation of ammonia in the chicken house, the concentration increases, leading to broilers ammonia poisoning or cause other diseases.  In order to prevent the adverse effects of ammonia on broilers, it is recommended that chicken farms (households) pay attention to the following feeding management work: minimize sprinkling during operation and prevent water leakage in the sink;  If the humidity in the chicken house is too large, the feces and wet bedding should be removed in time.  In addition, ammonia deodorant can be used to reduce the concentration of ammonia in the chicken house, commonly used ferrous sulfate, perphosphate, copper sulfate, hydrated lime, etc.

3.  Strengthen the feeding, can not forget disease prevention according to the different growth stages of broilers, according to the feeding standard to prepare the diet.  Due to the low temperature in winter, the broiler's calorie consumption is large, the standard of metabolizing energy in the feed can be appropriately increased when preparing the diet, and the proportion of protein in the diet can be appropriately reduced, and special attention should be paid to the content of vitamins in the diet to meet their needs.  The raw grain of the feed must be free of mildew and impurities to prevent respiratory diseases.  Do a good job in the prevention of viral diseases and bacterial diseases.  When the broiler is weak and the resistance is decreased, some diseases can also induce respiratory diseases.  Therefore, while improving the body's resistance, it is necessary to do a good job in the prevention and treatment of related diseases.  Those who have vaccination should be vaccinated strictly according to the immunization program.  At ordinary times, we should often use some drugs to prevent disease and regularly disinfect the chicken coop.

4. Strengthen the management, can not forget to carry out strict washing, disinfection, fumigation, appliances, hats, houses and other thorough cleaning before entering the brood. Control drinking water, generally drinking water is 2-3 times of the amount of consumption, but should not be more water supply, because more water will aggravate the moisture of the cushion, and prevent water from running when using waterlpipes. Broiler flocks are susceptible to NCDS, especially those around 25 days of age in winter. The disease is the result of poor breeding management, mainly because the air in the house is dry, too much dust, and in the case of poor ventilation, is inhaled by the flock, long-term accumulation of disease. The prevention and control measures are to increase the ventilation rate on the premise of maintaining the temperature in the house to ensure the oxygen content in the house, which is the basic condition for the chickens to recover as soon as possible after the onset or less morbidity.

5. Environmental control, hygiene must not be forgotten. First of all, chicken seedlings should be introduced from healthy chicken farms tol strictly prevent vertical transmission of pathogens. Secondly, a good feeding environment should be created. The feeding equipment andl disinfection equipment should be strictly separated and sterilized regularly to prevent horizontal transmission of diseases. At the same time, the adjacent chicken farms and the local area should be regularly monitored for the occurrence of disease outbreaks, and preventive measures should be taken. The health status of the chickens in the farm was monitored regularly, and the epidemic situation was dealt with in time. Third, adhere to the principle of disinfection of chickens, eradication of rodents, strict prevention of rodent transmission of diseases, dead chickens burn and bury treatment, and isolation of sick and healthy chickens.