How old is she? Does she lay eggs, and have you seen any thin or shell-less eggs? If she eating and drinking normally? Is her tail up or down? Can you feel of her crop and tell us if it is empty, full, firm, doughy, or puffy? Check it again in the am before she eats or drinks anything, when it should be empty. I would consider worming her, and if a vet could do a fecal float, that might be good.