I got my turtle 10 days ago, and just a couple days ago I noticed that she's starting to fade on her skin, like turning white, and I don't know if I should be worried or not because she's eating lots, getting her exercise and basking when need be.. She's also starting to fade on her front legs near her shell. Her shell is nice and firm. I just don't know if I should be worrying about her health or not..?