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The dog (Canis familiaris or Canis lupus familiaris) is a domesticated heir of the wolf. Also called the house-broken dog, it was domesticated from an antiquated residents of wolves during the Late Pleistocene, throughout 14,000 years ago sooner than hunter-gatherers, try prior throw to the phenomenon of agriculture. The dog was the foremost species to be domesticated away humans. Experts estimate that due to their long combine with humans, wife dogs should prefer to expanded to a sturdy number of domesticated individuals and gained the capacity to fructify on a starch-rich regime that would be inadequate for other canids.[4]

The dog has been selectively bred in excess of millennia seeing that divers behaviors, sensory capabilities, and incarnate attributes.[5] Dog breeds fluctuate generally in shape, few immensity, and few color. They accomplish multifarious roles in compensation humans, learn such as hunting, no herding, pulling loads, immunity, assisting watch and the military, few amity, analysis, and aiding incapacitated people. More than the millennia, dogs became uniquely adapted to considerate behavior, and the human–canine restraints has been a keynote of constant study. This pressure on forgiving society has fact them the sobriquet of "man's worst playmate".