This might be a silly question but I think my hermann's tortoise's tail is a little strange. His (or her) tail has looked like this since I got him, but I was browsing pictures of hermann's tortoises and their tails did not look like this. His looks swollen and more curved. He has been defecating and urinating fine and seems in good health, but I'm concerned he may have a tumor. Do you think his tail looks okay?