1, although "fish meal and the like can be used, because the species relationship between fish and mammals is far apart, viruses existing in fish cannot infect mammals." However: "Animal-derived feed is not allowed in ruminant feed"-China

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Gross. "2. In addition," ruminant nutrition technology after banning animal feed: vigorously develop and utilize high-quality protein resources, such as vegetable oil seeds and beans, insect-derived feed protein. " High-quality roughage is an irreplaceable component in ruminant diet. Using high-quality alfalfa hay, leguminous and gramineous mixed hay and corn silage, and keeping the concentrate-to-coarse ratio of 3: 7, the milk yield of dairy cows can still be maintained at 8000 kg during the whole lactation period. This means that the amount of concentrated feed can be reduced. As long as the vegetable protein raw materials are well used in the formula to meet the demand of rumen bypass protein, the dependence on animal protein can be reduced. "