Thanks for all the replies!

We've had him for over 6 wks and he used to go into his hide all the time. I have 2 snug hides, each w one entrance. I've use coco husks since we've gotten him. When he's resting he is staying outside his hide. I check the temp in the hot hide all the time w a probe. It's around 90F.

We feed him fussies, so maybe it's time to switch to rat pups or adult mice? I haven't weighed him. Will go and get a little digital scale today - seems like a good idea.

I do not have a thermostate. Where can I get one? They don't seem to have them at the pet stores.