Dogs are naturally loving and affectionate. Their pack animal nature makes it easy for dogs to develop strong bonds with those they perceive as members of their pack. They are devoted to whomever they see as their leader.
Studies examining the dog-human relationship have found that over such a long time of living so closely with people, dogs have developed the ability to empathize with human beings, read our body language and facial expressions, and develop their own ways of communicating with us.
The more you show them love, the more likely they are to show it back to you. So the next time you look at your dog and see those adoring eyes gazing back at you, you can be certain that the love you perceive in his gaze is the real deal.
Fetched partially from hillspet.com