Warning, LOOOOONG post!! But I'm desperate! Ok so I've been researching and treating my chicken all day and I've read sooooo many threads that now I think my chicken has every chicken condition under the sun! SOOOO I'm going to post my situation here and hope someone can help me figure out what's going on. The chicken in question is a hen that I inherited with the property we bought this last August, along with 9 other hens. I have no idea how old she is or what breed she is, but I'm guessing she's over 5 years old and I'm pretty sure she's an ISA Brown. She's a very large hen. I've been watching her pretty closely for several days (I don't know exactly how long because tbh I just thought she was getting old and was going to die) because initially I noticed that she was going to the coop earlier than the other birds and was staying in bed later than the other girls. She would do this for a day or so and then the next day she would be out and about with the rest of them. Which is also part of the reason I assumed she was just getting old. I feel like it's important to note at this point that she and the other hens that lived there when we moved in are not friendly at all. Impossible to catch and not social. So today I noticed she didn't come to the "flock party" which is strange because all of the chickens come running when I call them for their treats. I walked around to the back of the house and noticed her tail sticking out from under a bush. I figured she finally kicked the bucket, so I walked over to pick her up and dispose of her remains. To my surprise she was still alive but clearly not feeling well. So the research began....... I initially thought maybe she was eggbound. she also had foul smelling poop caked all over her rear end, so I took her inside to give her a bath hoping it would help if she truly was egg bound, and also to wash her up. Well, i was trying to get her clean, but had a hard time seeing what I was doing so I gently leaned her forward so I could get a better look at her rear end, and then she vomited a LARGE amount of the nastiest stuff I have ever seen come out of a mouth. It was so dark brown it was almost black and it smelled horrendous. Like seriously awful. Reminded me of cecal poop. So after I finished washing her up I started researching...again. To make a long story short, I'm fairly certain she has sour crop. But the stuff coming out doesn't smell sour, it smells foul. Again, like cecal poop. She stinks in general. It's awful! Also, she's not eating or drinking and she actually let me pick her up which tells me she's really not feeling well. Shes not egg bound...i checked....akward In my research I read that the caked on poo could be from worms?! Also, at this point, from what I've read, it doesn't sound like there's much I can do for her. All of the other chickens I read about that had similar stories to her died . If I can make her better I will do everything I can. But first I have to know what's going on! Any help would be GREATLY appreciated!!! I don't have pics, didn't think to take any until now :/. I do have her quarantined in a large dog crate in my garage. I removed food and water so I can check her crop in the morning when I get home from work...I hope she's still alive!