Haniel L’s Reviews > What your Dog Knows > Status Update

Wolves that were naturally more open to human contact, and thus less inclined to avoid it, began to accept food from and then perhaps work with humans to defend their cattle and sheep (rather than seeing herding animals as prey), ultimately taking a place by the hearth. They saw advantages in being cooperative, rather than purely self-reliant, and, as these tamer wolf-dog tended to mix among themselves,.

Dogs and wolves have identical DNA and they can crossbreed to create wolf-dogs.