He's eating small rats now. They actually look to be small to medium but I try to get him the smallest ones in the tank. I can't wait until he gets bigger so that I don't have to be so picky but that's the way the pet shop is here. The same pet shop that I posted about that I got the grapevine with bugs in it. I hate that place but it's the only petshop that I know about around here that sells rodents.