In fact, archeological evidence, like buried dog bones near human settlements, only really date back 13,000 years. So it stands to reason that the current theory is that wolves evolved into dogs without the help of humans. But once dogs and humans started counting on one another, they became inextricably linked.

Since the early days of becoming man’s best friend, dogs have become emotionally bonded to us. Many dogs pick up on our moods, and can tell when we’re sad or angry. And we understand dogs in return. We can read their expressions and tell when they’re scared, upset or joyful.

Pack Behavior
Loyalty is also just a natural behavior for dogs. Dogs are pack animals, meaning they are social creatures who prefer the company of other animals. This behavior is a survival mechanism too. Packs succeed because the members of the group depend on one another to survive.

Many dog trainers and other animal experts believe this pack mentality also causes dogs to be loyal to their humans. They think pooches view people as just another member of the pack. So dogs don’t just love a good cuddle — they also think loyalty will keep them alive.