I've been to the slaughterhouse lots of times, my family has raised sheep my whole life. The bolt through the head is a quick way to die. The problem is the last few hours/days of the animals' lives. The smell of death is thick in the air - the animals are absolutely freaking out. They are packed into stalls and then hauled onto the killing floor. The problem with this is the animals build up maximum levels of stress hormones and waste material in the meat. I've never seen it, but chickens are treated more like objects than living things in the American industrial farming system.
That's why mobile slaughter is such a big improvement. The animal is led out of the barn into the field with some grain, usually they don't know what hit them. The meat tastes better and is better for you, guaranteed.
Interesting turn on the thread, not meant to derail.
Which of the above does hunting closer resemble?