Professor Lu: add lard to ruminant feed

Can I add 3% lard to the cow feed? What's the advantage? And the disadvantages? Please give me some advice! It is best not to add animal protein to avoid causing mad cow disease. With the addition of animal protein, the cow grows well-3% lard seems to inhibit rumen microbes.-lard can replace 3 jin of corn with one jin of lard. It seems inappropriate to give the cow lard. It is better for the cow to eat all kinds of grass. -- Oh, it's okay to add, but not allowed.-- it's not suitable for adding animal fat. Inhibiting Vitamin fermentation-- how to improve the Milk Fat rate It means that full-fat soybeans can be added through refined supplements-wheat bran and bran wangzhi6189. It seems that someone must have used it. Can you tell me the benefits? You can add rumen fat! one