Im still non the wiser what I do about his food size. The baby rats look far to big to give him and the adult mice are probably a bit too small. On another note, I did feed him last night but he was not all that keen and took a good amount of coaxing. What I did THINK I noticed was that his eyes where going a bit misty. I can be sure as he never really ventured far out of his hide to take the mouse. Maybe starting a shed? I have no clue.