His temps and humidity have been perfect. I thawed the rats for about 4 hours as well, always feel the stomach and head to make sure it's thawed all the way too. And I warmed them by hairdryer several times while offering, every minute or so.

I feed him a medium rat every 2 weeks, it hasn't caused any problems yet but certainly if he continues not to eat I'd try something smaller.

He's always been a good eater so I honestly think this was a one-off where he wasn't in the mood. Unless he continues I'm not really concerned at all, but I don't expect him to. Even now he's been out and about looking for food again lol.