The scope of livestock and poultry feed including cover is mainly pig feed, laying chicken feed, broiler feed, meat duck feed, laying duck feed, etc. In the past, these feed raw materials generally use corn, wheat, soybean meal, vegetable meal, cottonseed meal and other conventional raw materials, the quality of feed pellets is not very high, so it is considered relatively easy to process,most enterprises do not pay special attention to the value of the ring mold to these feed production. Now because of food shortage, various feed enterprises are studying raw materials that can replace these general raw materials,