While I've never had the need to cull a chick, with a adult birds I take the neck right off the bird ( like breaking it, just pull harder ) I think that way, I at least know the bird is completely dead, not just immobilized. Never done the chopper block method, knowing me, I would probably miss. As for cutting the jugular vein, I can't help but think that's it's less humane, at least with the other two methods, you KNOW it's dead, with cutting the jugular vein, you're just letting it bleed to death, and really don't know if it's feeling pain or not.