The ideal method is the one that you can use with confidence. Crushing a head is great.. if you can do it. I'm sure a bird with a semi-crushed head is going to disagree with it being quick.
There's a method that put a knife in through the roof of the mouth (where it's split) straight into the brain. Quick, relatively painless.... but if you can't do it right.. it could suck, badly. There was a bird that lived for years after being almost completely beheaded.....
http://en.wikipedia.org/wiki/Mike_the_Headless_Chicken
Wikipedia isn't a great source, but if it's true.... YUCK and OUCH.
There's a method that put a knife in through the roof of the mouth (where it's split) straight into the brain. Quick, relatively painless.... but if you can't do it right.. it could suck, badly. There was a bird that lived for years after being almost completely beheaded.....
http://en.wikipedia.org/wiki/Mike_the_Headless_Chicken
Wikipedia isn't a great source, but if it's true.... YUCK and OUCH.