Beer lees: The leftovers from the production of beer, mainly consisting of high-quality barley malt, selected specialty rice, corn starch and other by-products. This product contains yeast enzyme and amylase. Adding this product to the feed can improve the overall feed utilization rate. This product is suitable for pig feed, aquatic feed, especially for broiler feed and dairy feed. Due to its high crude fiber content, it is a good raw material for feeding cows and can improve milk quality to a certain extent after use.