The Gray Wolf is the largest wild dog in the world. In legends, myths, and folklore, the Gray Wolf is often depicted as a villian. But you may be surprised that your Dog has some wolf in him. DNA tests prove that the Domestic Dog is the decendent of domesticated Gray Wolves. In fact, scientists consider the Domestic Dog a subspecies of Gray Wolf. As a matter of fact, the Gray Wolf doesn't deserve its villianous reputation. In fact, people have killed more wolves than the other way around. In Yellowstone, hunters wiped out every wolf from the park. Later, breeding populations, brought by Canada, were released into the park. While Gray Wolves have attacked people, those wolves most likely had rabies. Other than that, there is no recorded case of a Gray Wolf attacking a person.