Hello everyone, one of my chickens is acting strange from the last month or more. She doesn't look sick or slow so I was not concerned at first, but now its too much time for it. When she walks or eats she is fine, but when she sleeps or is standing doing nothing she closes her eyes, turns her beak upwards and makes this small "Quack" sound every often. Is it some disease or sign or her developing some disease, if anyone knows something please share, thankyou.