My snake's doing well now. I stopped holding him for a while, got her a bigger, more comfortable living place. I put a big rock on one side, then stones on top of that. I put some grass on the top of that, some sticks for climbing, and then about 3 inches of water for a swimming area. I found slugs and worms and put them on land, and a little fish to swim around the bottom. most of what I gave him disappeared, so I think he's eating well. also, shortly after I asked for help, he shed, and that might have bee why he didn't want to eat initially. Thank you, everyone, for your help.