Well, around here, for one - I've certainly driven by some of the properties that have lots of fighting cocks in a field in little separated huts on leg leashes. I've been told by a breeder here that that's something that can happen to small roosters sold/given away (we were talking about Cream Legbars). Processing them myself humanely is a much better end for them.
Oh, goodness.
What knife do you use for butchering? I like breaking the neck best for euthanasia, but for consumption that way don't let 'em bleed out, so I need a nice sharp knife.... Or loppers, if I can keep the kids away from them long enough to use them while they're not gummed up with pine sap.