His tail is always stick straight and falls back over his head when he hangs upside down. I always dust his crickets, and the other three geckos (1 crested and 2 cats) that I own get the same diet. Granted, the other crested doesn't have a tail. Also, ever since this started happening, he lost all his tameness and goes completely wild when I try to handle him, which is bad because the only way he eats fruit is if I hold it right in front of him. Does anyone else have any more concrete info?