Not everything you see in writing is true. Those instances could easily have been feral dogs, who are not afraid of people and yes, feral dogs can be and are vicious towards people and pets. I personally would have to have more documentation then a written account of something that happened thirteen or fourteen years ago. In the case of rabies I suppose maybe. But we have coyotes everywhere here and always have, and they are certainly used to people, but they don't hang around wagging their tails and waiting for food. They have never even bothered our chickens. And they cross our yard once in a while, too. There is lots of game and other stuff in the wild for them to eat and that's what they do. They are terrified of people. I agree though that it is never a good idea to feed any wild animal, unless it's something like wild birds. In your instance I would guess that it was either a wild dog who resembled a coyote, or maybe the coyote had rabies or was sick with something else. Or maybe your dog was in heat. I guess I would have had to've been there, but I think it is very unfair to all wild animals to automatically assume that every wild animal is an enemy meant to be destroyed, just because they have the misfortune of entering your property. If they are preying on your livestock or legitimately posing a threat, ( beyond just being afraid of anything that looks like a wolf), that is another story. There is open season on them at all times here, because there are so many of them. Coyotes have a reputation for being smart and resourceful, and are very interesting animals.
I'm glad your hen came home.