UPDATE: She has gained the weight back. She needed a serious change in diet, but now she is plump. However, it's been getting much colder, so she comes out less to bask. I hope she isn't starting brumation, because then she may not be a blue. According to the seller, she is a definite blue, so I assume that this is normal, and that instead of brumating she slows down. Am I right to believe this?