Look she isnt a family pet really, just here for the gardens and the eggs. I couldn't kill her myself though, I don't have it in me. I'd rather try everything possible before I take her to the vet to get put down.. I felt around the area and it was mostly just clear fluid which we let out. I couldn't feel any hard masses when I was draining the area. I have seen my chickens pass things exactly the same as in that link, probably about the size of my thumb. She is still pooing and they look quite healthy. It honestly looks like she has pooed got it stuck in her bum feathers and it has become fly blown, the area has become hard with dead tissue as you said and because of the maggots her body has started secreting lymph to the area. Could this be a possibility? Also we are in Australia, do you know how much it would cost to put her down at a vet? Please dont think I am silly I just cannot snap her neck or bear the thought of someone else doing it either.
I think you're right on here.
If that's a scab, fine. But if need be, you can peel some away and see what's underneath. I am sorry to say that I had noticed that my hen
had fly strike and I cleaned it and put ointment on it, and then a day later she died from EYP. Yes I did open her up and look.
I am wondering if she has that liquid in her true abdomen or not? Could be she has infection under that mess or it's been eaten deeper than you think. I might think about pulling that scab off and cleaning the area and put ointment on it and let it heal clean at least. If she has ascites or EYP her abdomen should be heavy, big, hard, or like jello.