This morning when I went out to check on the chickens, I found one of my hens, Black-Eyed Susan, apparently not feeling very good. She is puffed up and standing with her back end hanging down. She also has a pretty serious poop butt and her comb is purple and flopped over way more than usual. She is still interested in food and water especially, and is drinking plenty. I washed off some of her poop butt and there is nothing blocking her vent, and I felt around and compared it to one of my other hens and it doesn't really feel like there is an egg in there. Also, I found her in a box in a position almost like she was about to lay an egg but nothing was happening. Her feet are way paler than usual and she's tapping her feet every once and a while, almost as if she's getting bitten by fire ants but she's not. Based on that and the fact that her comb is purple-ish, do you think that her circulation is being cut off somehow? Other than seeming super sleepy, she still seems pretty alert. She was one of my first hens and so is very special to me. She is about four years old. Here are some pictures. Let me know if you need better pictures. PLEASE ANSWER SOON!! Thank you!