Silkworms are a good choice. I don't feed them, usually because they end up growing out of useable sizes before I get a chance. I bought silkworms once, and ended up stuffing every Tarantula I owned with them...some of the t's looked so full, they looked almost drunk when they stopped feeding. *wobble wobble* ok, I'm done now...I haven't even eaten half of this silkworm, but I just can't eat anymore!

I've never had a problem with the superworms biting. I still feed superworms, mealies, and crickets. My roach colony is recovering from a bit of overselling and I haven't had a chance to fed those yet.