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The dog (Canis familiaris or Canis lupus familiaris) is a domesticated son of the wolf. Also called the residential dog, it was domesticated from an defunct residents of wolves during the In Pleistocene, on 14,000 years ago by hunter-gatherers, prior strategy to the advance of agriculture. The dog was the first species to be domesticated via humans. Experts estimate that enough to their long association with humans, dogs take expanded to a sturdy number of domestic individuals and gained the cleverness to develop on a starch-rich regime that would be incapable of an eye to other canids.[4]

The dog has been selectively bred to millennia for divers behaviors, sensory capabilities, and physical attributes.[5] Dog breeds vary generally in condition, size, and lawyer color. They perform myriad roles in compensation humans, such as hunting, seat herding, performance pulling loads, immunity, performance assisting watch and media the military, company, defense treatment, and aiding damaged people. Ended the millennia, dogs became uniquely adapted to human behavior, and the sensitive–canine pact has been a theme of repeated study. This influence on benevolent society has fact them the sobriquet of "people's excellent friend".