Youtube has a really good, instructional video on humane home processing. I can't remember what it was listed under, but I found it impressive...I've read a little about it and the very strong suggestion is you NEED to process some birds first so you know what is where inside the bird or you'll make a mess of it.
I also saw some videos on how to humanely kill a chicken and I have to agree, it looks fast with minimal if any pain. Well, except the human emotional pain. Suffice to say, it isn't the "stretch the neck on the chopping block and swing the axe", or "twist their necks until they snap" methods that 'we' all think of based on what we have heard. I'm still not sure I could do it but with my "emotional vegetarian" daughter around, I don't have to find out though it looks a lot better than what I imagined.
Bruce