I worry that he still has a latent infection and on our vet's orders we have been keeping his warm side a little warmer at 90 degrees to help him fight it off if it's still there. He's not currently drooling or exhibiting symptoms, but his "bad attitude" has remained in every enclosure configuration since around the time he first had the RI.
Dums really don't need to be all that warm. Does he have a place to go to cool off? If not that may make him pissy.
Also the higher heat may be boosting his metabolism so he could very well be hungrier than a Dum kept at more typical temperatures.