Thought I'd post a quick follow up. He had his first shed (since I got him) on Saturday. Perfect shed, all one piece. Then today he took a 22g adult mouse. Didn't really want anything to do with it for a while. After 10 minutes or so I got a bit frustrated and laid the mouse about 6 inches from the hide he was in and walked away. After a few minutes of looking at it there, he decided to "kill" and eat it. Now he's resting comfortably back in his hot side hide.

Thanks for your advice. I think he'll be much happier with this meal size.