America's Extinct Best Friends

America's original best friend was done in by factors such as disease and cultural persecution, traits the Europeans brought with them to the new world.

"It's quite incredible to think that possibly the only survivor of a lost dog lineage is a tumor that can spread between dogs as an infection. Although this cancer's DNA has mutated over the years, it is still essentially the DNA of that original founder dog from many thousands of years ago." *** I wonder if this cancerous dog's name was "Montezuma"?