Jan 6, 2021 · But we can use the simplest cost feed formula to make catfish feed. (1) 40% hay powder, 30% silkworm pupae, 10% vegetable cake, 20% barley, and a feed coefficient of 3. (2) Green hay 40%, cotton cake 30%, bean cake 10%, rapeseed cake 5%, silkworm pupae 5%, fish meal 5%, wheat 5%, and the feed coefficient is 3.