Hello, I have a 4 month old ameracana that started stumbling when she puts her head down to eat. She is bigger than her sisters and has a more developed comb and waddle. She sits on her butt when she puts her head down,but when she is running she looks normal. She gets bullied by the barred rocks ,but has no wounds. She can balance on a roost as long as it's wide enough. The other two chicks that are her sisters always try to get under her to sleep and have always done that. I am wondering if maybe since she is growing faster that she is just out of balance. I think she will grow out of it, but my husband is worried. Thanks in advance.