Not that any one of you are likely still interested, but thought I'd post an update. I tried feeding in the enclosure as well as ensuring that the mouse was at 100 degrees. And now, he's eating like a champ. I'm always curious as to what size is appropriate for feeding and I know there are countless threads and info out there, but I always went with width of the body and width of the food. I'm starting to feel like despite being very young at the thickest part of his body he could take care of a small mouse without any issue. Thoughts?