I mainly feed them crickets, with the odd mealworm. As for supplements, I use the Fluker's Repta-Calcium every other feeding, though I might skimp on supplementation, and Flukers Reptile Vitamins about once a month. As for why I want them big, I don't. I just have heard people say there frog was full size in a year ot 2, and since my frogs were still the same size since metamorphosis, I thought I was mistreating mine. Obviously if they have live 4-5 months I think they are ok, but if you have any suggestions please tell me.