I tried feeding frozen last year but he wouldn't take, I figured maybe I would try again since he's a lot bigger and frozen rats are cheaper and safer. Been trying a few weeks now and he still won't go for it no matter what I do. Temps and humidity is right. Rat is properly thawed and I've tried warming it up in warm water , wiggling it, feeding at night, etc. Are there any other tricks or will he only eat live?