He can always put the excess roaches in a bag and put them in the freezer. That's what I do. I crush them up and mix them with my roach food. Waist not want not.What's the point of breeding them then? They need food, water, care, and they are expensive. I have a colony to feed bearded dragons, tegus, jeweled lacertas, AND my T's. The food itself can get expensive, and if they do overbreed, what are you going to do? You can't just set them free.