"Genetic (mitochondrial DNA) testing being performed at the University of South Carolina, College of Science and Mathematics, indicates that these dogs, related to the earliest domesticated dogs, are the remnant descendants of the feral pariah canids who came across the Bering land mass 8,000 to 11,000 years ago as hunting companions to the ancestors of the Native Americans."
I have read about those dogs. We always called them Mexican Yellow Dogs because you always saw them there. We have a Black Mouth Cur which looks like a hound dog Yellow Dog cross.
Looks like Old Yeller.