He has not been dropped or taken any falls that I know of. I have noticed though, a small bump on the top of his back and has been there since I have gotten him, so it's not food digesting. I don't know what it is, it may be a causing factor of what's happening. There are two climbing branches in his enclosure. He has had this problem since we got him and we got our turtle a week after we got him. I wash my hands before AND after I handle him and clean out his enclosure. I have researched what to feed him b/c I don't have access to pinkies, so I have been feeding him large insects such as crickets and grasshoppers.