The breeding of commercial pigs should pay attention to the prevention of cold and heat and go out at the right time.

Cold and heat prevention: the suitable temperature for the growth of fattening pigs is 15 to 23 degrees, the temperature is too high, the feed intake is too high, and the temperature is too low, but if it is used to maintain an increase in energy consumption, it will reduce the rate of weight gain or lead to weight loss. Therefore, it is necessary to keep warm in winter and cool down in summer.

Timely fencing: the suitable time for lean fattening pigs should be determined, first, the carcass quality of pigs should be considered, second, consumers should be adapted to the requirements, and third, economic benefits should be considered. Precocious and fattening miniature pigs should be 70 to 80 kilograms, while large lean pigs should be 90 to 110 kilograms.