I fed mine fruit flies, they are easy to keep and breed like mad. Pin head crickets are also a good choice. Ants work too, some people will tell you that their exoskelitons are hard on their dijestive systems, but thats what they eat in the wild, some ants in South America and Africa have some sort or Poisonous chemical that the frogs are able to store in their skin and thats the reason they are poisonous in the wild, and not in captivity. Any way, whatever you feed them, make sure to gut load them and keep their water very clean.