posted 3 years ago
It is part of a chicken's mind-set to act like they're not sick because chickens tend to attack and chase off sick chickens. This doesn't help the decision-making process.
If you're fairly sure the bleeding is from the other birds pecking at him, you could make a version of the chicken diapers found online (a holey sock is the usual starting place). This would cover the area and stop the pecking and also give you some idea of whether he's pooping normally still.
If he's just acting a little tired and being fluffy part of the time, taking a few days to observe more closely and say your goodbyes is not something I'd classify as cruel, however, the cases of cysts and tumors I've seen or read about will not go away on their own, but are also not normally fast-moving, so again, this is not a "deal with it right now" problem - you've got time to decide.
I've also read that chickens don't tolerate surgery all that well, not to mention the cost is greater than the value of the bird. If this bird was hand raised that helps, but there's no real way to explain surgery or determine pain levels post-op, not to mention he'll need to be isolated and cared for by you at home post-op. My cost/benefit to the bird balance tends to err on the side of "he can't give his consent, so it's not fair to take the chance".
End of life killing of animals is something that homesteaders need to plan for and find ways that work for them. There's a video somewhere on permies about humane killing of chickens by putting them in an apron on your lap and getting them completely calm and then quickly slitting their throat. That said, if an animal is special to you, asking a friend to do the task for you, is not unreasonable. I've offered to do so for others. If you've not killed a chicken before, starting on a chicken that's special to you isn't the easiest way, I don't think, but there are many factors.