i have been to a few seminars about coyotes and was told every time that a coyote will NOT breed with fox or domestic dog and that there is no such thing as a coy dog.
Anyone who believes "Yotes" do not bred with domestic dogs needs to do a simple test. And not a DNA test either.
Take a female dog that is in heet, and put her in a pen where coyotes are and see if the "yotes" are attracted to her.
I had this happen to a dog I had a few years ago. She was in heet, and there was a coyote trying every thing it could to get into the pen with her one evening about dusk.
I lived in the country , and nobody lived right behind me so I placed a shot to the head on that critter.
I for one believe they do cross breed and have seen a full body mount of what they call a coydog. They even look like a cross breed.
Woody