The most likely scenario is that a human hunting party came across a very young Wolf Cub and decided to take it with them. The Wolf Cub would have been very puppy like at an early age, when grown although far less trustworthy than a dog of today, would not have been quite as dangerous as a wild Wolf. A semi-tamed Wolf would probably have had considerable value to a hunter gatherer group, lending its superior hunting senses to the group. This would have helped not just in hunting but defensively as a warning system as well. The evolution of the wolf to the domestic dog began.