You could grind it up, but basically any insects are good for protein. The mix we're going to use is: 5kg organic wheat grain, 5kg raw barley grain ,5kg oat groats, 5kg hulled millet, that's about 13% protein, and then we're adding meal worms, pumpkin seeds, sunflower seeds etc.. which are all high in protein (but also fat so don't give too many). Plus other things, I don't have a list right now, but if you google high protein seeds and grains you should find some info. We're mixing it to about 23% protein, and they're going to have an outdoor pen, so they can dig up insects and such.
Oh and we're also sprouting some of the seeds and grains.