My hen hasn't been herself in two days. She just stands there and closes her eyes as if she's very uncomfortable. When I pick her up, yellow goo drips out of her beak and it smells rancid. She doesn't seem to have an overly large crop and it doesn't seem that she's got an egg-bound issue. She doesn't squawk or make any fuss with I pick her up. She does rock her neck side to side and has a weird gurgling sound that comes from her neck I think. I have no idea what is going on. We've never had any health issues. I've heard a bit about sour crop. Could that be it? Any suggestions on how to make her feel better?? I did see her drink water yesterday. But, Haven't seen her lay or eat in a day.