Don't like to be negative but there are several books out there and they have been around a while that has "information" that is just wrong. They mention feeding mice, rats and goldfish to you Horned Frog. I am hardly an expert but don't feed them these. Feed them dusted Crickets and Night Crawlers. I started feeding these when I first got FROG from Petco on December,2013 and he is still going strong. He was about the size of a half- dollar and now he is the about 6 inches across.The best source for information on Horned Frogs or any other Frog or Toad is right here on this Forum!