My problem child, Pops the Russian tort is causing me more grief. He has taken to burrowing under anything and everything in his outdoor enclosure which would be fine but he's doing a lot of damage to the top of his shell by scraping it on the rocks, concrete blocks and large chunks of wood that he likes to hide and sleep under. He has lots of other hides and plenty of deep shade but he prefers these shallow burrows. Is there something I can put on his shell to prevent further damage? I'm thinking about epoxy maybe. Could this become a health hazard if it continues? Will he eventually do real harm? It's hard to tell from the photo but there is a pretty deep gouge.