Friday night, 1/11/18, went out to the flock to collect eggs and noticed that one of our birds had poop all down her backside. Upon inspection saw that she had a pretty terrible prolapse and it appeared backed up with poop. I thought it was an impaction so I tried to remove what poop i could. We brought her inside to the basement, where she is in a dog crate. We have soaked her several times and tried to clean off the dried poop. The white part of the poop is really hard to get off. We tried to gently push the prolapse back in but she keeps pushing it out. Later that first night she made terrible noises and laid an egg. Poor girl, it must have hurt so bad. I should add that it looks like our other hens had been pecking at it because it looks like it is wounded on the side. Past 2 days we have irrigated the prolapse, soaked in epsom, sprayed with vetericyn, and apply preparation H (approx 2/day). We have also been giving her vitamins in her water. Honestly, I have little hope that what we are doing is helping; a large area of the prolapse is black with a hardened lump and she makes a distressed call every time she pushes poo out. She's still eating drinking, and pooping. Any advice would be appreciated. We are prepared to cull her if necessary, but want to try to save her if we can.