Hi! I've had my female leopard gecko for about 9 years now. She's always been happy and healthy, until now. For about a couple months her tail hasn't been able to gain weight at all. Her belly is not skinny, just her tail. I repeat, her body is rather fat, but her tail is abnormally skinny. She still has an appetite, and eats really well. Although, I'm just confused why her tail wont gain weight.