Those tiny, fluffy dogs walking down the street may look cute but beware – they probably have some wolf in them.

Dogs were the first of any species that people domesticated, and they have been a constant part of human life for millennia.

On average, terriers, gundogs, and scent hounds have the least wolf ancestry. While some large guardian dogs have high wolf ancestry, others including the Neapolitan mastiff, bullmastiff, and the St.

Your furry friend might sleep on your bed and beg for treats, but deep down, your dog still carries ancient wolf behaviors.