hey my Japanese bantam hen has her tail dragging on the floor and when I tried to lift it up it wouldn't stay up. I never seen her droppings but she does eat. she only eats bugs and worms but never her chicken food, but when I mixed oats with water a day ago she ate it . is she sick if so what can I do to help?. oh and I just got her about a week ago if that could be the case.