I'm pretty sure he ate. I changed the substrate (see below) then tossed him and a worm in. Today, I took him out, then messed around with the dirt/added water. No worm. So, I assume he ate it.
http://img.photobucket.com/albums/v1...e/IMG_3890.jpg
I changed the substrate from aspen to dirt from a local dried up pond the other day. He was a little hide that isn't in the picture.
http://img.photobucket.com/albums/v1...e/IMG_3892.jpg
Chilling like a boss.