1. In the early spring weather, the temperature difference between the morning and evening, the temperature is abnormal, and the inside of the farm is humid, which is very easy to breed various viruses and bacteria;
2. The environmental hygiene in the pig house is poor, Disinfection is not timely and incomplete
3. The feed is not comprehensive, resulting in insufficient intake nutrients or low feed quality, bacterial infection, feeding such feed will cause the overall immunity of the pigs to be low, and it is easy to cause diarrhea.