Dogs perform many roles for humans, such as hunting, herding, pulling loads, protection, companionship, therapy, aiding disabled people, and assisting police and the military.
dog, (Canis lupus familiaris), domestic mammal of the family Canidae (order Carnivora). It is a subspecies of the gray wolf (Canis lupus) and is related to foxes and jackals. The dog is one of the two most ubiquitous and most popular domestic animals in the world (the cat is the other).
Domestic dogs are mostly kept as pets, though many breeds are capable of surviving on their own, whether it’s in a forest or on city streets. A third of all households worldwide have a dog,...Dog - Breeds, Temperament, History: There are about 400 breeds of purebred dogs worldwide. A purebred dog has a genealogy that can be traced for three generations within the same breed. Sporting dogs are hunting dogs that scent and either point, flush, or retrieve birds on land and in water.