My red foot has developed what looks like a cut right at the back of his head where it attaches to the soft skin on top. I can't imagine anything causing this aside from his own shell. Any thoughts? Attempting to get a picture of the wound but the phone scares him so getting a good picture of the wound has been impossible so far. I don't know if there's anything I can do other than hope it doesn't get infected and add get tortoise used to phone on the todo list.