No no, I feed two large mice. Every one to two weeks (when we rescued him the previous owner fed him that way, and he was my first ball so I didn't find it odd.) I used to have a RTB and she only ate once a month, so I thought it normal. I can't weigh him until he stops striking at me. But if I had to guess (from the last time I held him) I'd say 3-5 lbs?