Rex,
For some reason, your post reminded me of a wild dog caught by a government trapper. It was while I was in high school--which was many years ago. I was living in Okmulgee, Oklahoma, and, west of town, there was the Deep Fork River bottoms and, on beyond that, a 10.000-acre public hunting area. Coyotes abounded and were considered a problem, so the government would send in a trapper periodically to thin them out. I can recall seeing pictures of coyotes stacked up like a rick of wood. One year, the trapper caught a smallish, black wild dog. He told the PHA assistant manager, who was a friend of mine, that the dog was the most vicious thing that he had caught. It was so vicious, he said, that he had to shot it to get it out of the trap.
Was the dog an abandoned pup that somehow managed to survive and integrate himself into a coyote pack?
Was the dog an adult that went wild?
He didn't appear to be a cross between a coyote and a dog: he looked dog.
I don't remember--I think that I never knew--whether that government trapper was state or federal.