1. Pigs convert inedible feed, pasture, certain grain by-products from mills, meat by-products, spoiled feed, and waste into valuable nutritious meat. Most of these feeds are either inedible or not very palatable to humans. 2. Pigs grow fast and have strong reproductive capacity. They can give birth

With the rapid development of the pig industry, more and more professional households use closed pig houses to raise pigs in winter, which has played a certain role in increasing the temperature in the house, reducing feed consumption, and increasing the efficiency of pig raising. However, due to so