I haven't made up my mind about anything....other then live vs frozen....Id love more personal info (based on your experiences) about why in the enclosure vs having a smaller plastic "Feeding" enclosure...honestly for me at least the biggest issue was the risks and issues associated (that ive read about and heard from a few other bp friends) with him getting substrate in his mouth or hitting something else in the enclosure. He has never had any other issues with eating in what i have been using as the feeding enclosure (ive only had him 3 week and so far he ate 3 times via the method ive been using). Someone else suggested just in general trying a different species of mouse or rat too...?