Have you noticed him burrowing at all? My bp used to burrow from time to time and once in a while I would catch him burrowing under his hide. He'd lift up this heavy hide with his face and afterwards I notice some dry/flakey looking scales on his head. I put a decent amount of crumpled up newspaper in his tank and he doesn't seem to burrow at all anymore. I think it was a security issue. Hope this helps