So I guess I'm the dissenting voice here. I use loppers like the one you linked and it's the easiest way for me to dispatch extra roosters. I have a traffic cone nailed to a tree in the woods with the tip cut off to the right length. I stick my bird in the cone, open the loppers wide and fit the blade around the roosters neck, push towards the tree trunk to get a cut all the way through, and close the loppers firmly. The head always falls off. The carcass always bleeds fully. I never have to worry about messing it up, causing unnecessary pain and suffering, or wondering if it's really dead. Just make sure you sharpen and clean your loppers appropriately and they shouldn't let you down.