I have heard that mulberry leaves are okay. I don't know anyone that feeds that to them exclusively. Most people I know stick to the greens, collards and kale. There is a yahoo group for Corucia. Fresh green beans are good for them and most love them. Think green and healthy with occasional fruit treats and orange veggies thrown in. Green beans, lima beans, and powdered alfalfa are good for protein. No meat or tofu or eggs. Powdered monkey chow for putting on weight. Just sprinkled over like the calcium and vitamin supplements.