"Had you personally bit off any of those chicken heads? Just asking."
8^>
No. I used a hatchet.
I was only kidding, and I certainly believe you had every right to butcher a chicken on your farm. Also, a chicken's nervous system is not as developed as a cat's.
My wife was taught to use a plastic gallon milk jug at 4H.
Cut off the bottom and enough of the top to fit a chicken's neck. Tie it to a clothes line. Thread the chicken's neck through the opening in the milk jug. Slit the throat with a razor.
They even gave her a chicken to practice on. I think she was 12. I wonder if 4H clubs do that sort of practical training today....