There Is a Scientific Basis for This: Domestic Dogs Are Descended from Wolves, Which Man Once Took in and Tamed with Shelter and Food in Return for Them Acting...
There is a scientific basis for this: domestic dogs are descended from wolves, which man once took in and tamed with shelter and food in return for them acting as guard dogs. This reciprocal relationship remains in your dog's genes and their loyalty is a by-product of it.
Why are dogs more loyal than humans?
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.
Dogs are naturally loving and affectionate, points out Cesar's Way. Their pack animal nature makes it easy for dogs to develop strong bonds with those they perceive as members of their pack.