As Wilder mentioned, BBS is good. Other high protein foods (frozen, live, freeze-dried) will also be good, however don't feed too much, because it can cause them to bloat or get constipated. It's also a good idea to alternate in some veggies. Most anything works, mine seem to particulary like zucchini though. It's a good idea to blanch or boil the veggies, just to soften it up a bit for them. If you decide to go for peas, you'll need to shell them. And of course, feed them 3-6 small meals throughout the day, for the best growth. They have tiny stomachs, so food goes through them fast!