It's hard when they're house pets, compared to a wild rabbit or deer, or goat.
I do have a sook sometimes and give them a cuddle and tell them they're such a good, pretty little >insert chicken's name<
I even have this device called a chicken blinker.
It's like a little cup of black fabric that sits over their eyes. When they can't see they just squat down and burr quietly to themselves.
I use it so they won't panic and fight to get away, so it's as quick as possible, and also so they're nice and calm when they die.
When they're prepared for cooking it's just like any other meat; and they taste absolutely wonderful!