It sounded to me like the cockroaches were risky. I won't offer my frogs those, but, I got earthworms today and frogs refused them. I also have wax worms and mealworms. Their favorite is crickets. But I buy 20 crickets each time and several always die and some were large enough that I really don't know how frogs ate them without having a serious problem. The wax worms I have are never wiggly enough for frogs to see them. If I get small crickets I can't catch them, they spring out of their box faster than the eye can see. But I'll keep offering mine different food so they don't get bored.