I agree, they are not "puppies." That said, comparing them to serial killers is IMO going to the other extreme. They are just critters, doing what any animal, including me, would do to feed itself and family given what set of tools they were born with. Of corse they are not sentimentle about your chickens, dogs, cats, ect. I'm not overly sentimentle about the cow I just bought from the store either. But just because you can relate to their needing to feed, live, breath, ect. does not mean that you are in anyway out of line in protecting your food source. They would protect thiers, and do. If I had one in my pen and I had a clear shoot, I would take it. At the very least I would run out there screaming with a stick or something...LOL, maybe a rolling pen... You protecting your space is no different than any animal keeping its territory free of competition as well. And coyotes are obviously not on any endangered list. Get some good electric fenceing like has been suggested, some better housing if you need, if nessecery follow some of the harsher advice given, and enjoy your chickens. Those coyotes can find food somewhere else.