Animals are neither "good" or "bad" in the ethical sense. They just fulfill a niche in nature, a tiny cog in the great machine. Lots of animals eat their prey alive, I once saw a vid of a bald eagle eating a coot, the coot was still alive while the eagle plucked it (birds of prey don't like feathers apparently) and started tearing its guts out. The coot didn't finally expire until the eagle ripped out its gizzard and gulped that down. Right after the gizzard part of lunch a juvenile eagle swooped in and stole the coot. Its a hard knocks life in the wild. A clean humane kill as a matter of principle is the sole domain of the only animal that can have "ethics" or a "conciense;" human beings.