Hi. I have a three year old hen who is very sick. She has a swollen bottom below the vent and has lost most of the feathers back there. I've had a feel and there is no egg that I can find. She has had diarrhea for four days. She is isolated and confined so she will rest. I have been soaking her in Epsom salt baths every day and giving her ACV and probiotics and she is just getting worse. Her comb is getting darker and she just looks miserable. Any ideas on how to help her/ what is wrong? How long do you wait for recovery before culling a sick bird? Thanks.