Sorry - I wasn't very clear on my point. Shooting a horse or dog may be more humane than lethal injection. One shot, done. But a chicken's brain is so small that there is a margin for error. Therefore, I think decapitation is kinder to the chicken. With a good, sharp instrument, it's over in seconds. We tried shooting a turkey in the head once to kill it. We only tried once... Never again will I do that to any bird.
Yeah shooting a chicken, doesn't always work the way people think. We shoot a mean rooster once, even though they have small brains, it took 3 bullets in the head to kill him. He didn't seem distressed either just was walking around eating grass, while everyone else was going crazy.