He is stressed out, being in a new place he has to adjust. 2 things come to mind...first, don't handle him just after feeding. This is very stressful to him, give him a few days to settle down and digest. Second, get rid of the half log hide. He needs something he can get in and feel like he is completly hidden. I would also suggest you give him more time to get used to his new home before handling him.