Wax worms are pretty fatty, and not too full of nutrients so using them as a treat is fine, but they're not good as a staple. The way ajacobson described sounds like a good plan. Butterworms, hornworms, and silkworms are more nutritious and can be given more often. I'll give butterworms pretty often, if not every feeding when I have them. But I don't always have them around.