One of my chickens (cuckoo maran) has a swollen red abdomen, and I am trying to figure out possible causes/cures. I can always cull her as my last resort, but I am hoping I could save her. She is a little less than a year old. She's always been quiet, and I've been worried about her for a while, but I have seen no obvious signs of any health issues, so I thought it was just her personality. I couple of days ago I noticed that her entire backside was covered in thick poop. I washed her off and realized that her abdomen was red and swollen. She didn't show other signs of distress, and I discovered the problem, when she was pecking at some scratch with other chickens. My first thought is, of course, that she is egg bound, or something having to do with an egg, possibly broken egg inside. I felt with my finger, yet was not able to feel either an egg or any traces of egg shell. To be honest, I am not even sure what I am trying to feel for, but other than soft tissue, I can't feel anything. I've been giving her an antibiotic for a couple of days, hoping that it would stop any possible infection and let her body expel anything she needs to expel. However, she has been getting worse, she doesn't seem to poop at all, a bit of yellow and white liquid may come out but no regular poop. She is still walking, and other than not eating much now and her abdomen getting bigger and redder, she still doesn't show any appearance of being sick. She tried to make a nest and sit in it for a while this morning, but nothing came out. I am not sure how many days she has not laid, I have close to 40 chickens, so it's hard to keep an eye on all of them, but since I discovered her problem and isolated her (2 days now), she has not laid anything, and it doesn't look like she's pooped at all. Is there any way I could help her or is my only option at this point to cull her? How much longer can I keep watching and waiting/giving antibiotic? I am not in a hurry to kill her, yet I do not want her to suffer. I'll appreciate any input!