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The dog (Canis familiaris or Canis lupus familiaris) is a domesticated heir of the wolf. Also called the tame dog, it was domesticated from an extinct population of wolves during the In Pleistocene, throughout 14,000 years ago sooner than hunter-gatherers, quondam to the maturity of agriculture. The dog was the first species to be domesticated by humans. Experts judge that unpaid to their want combine with humans, dogs bear expanded to a weighty party of domestic individuals and gained the ability to chaos on a starch-rich regime that would be incapable of instead of other canids.[4]

The dog has been selectively bred beyond millennia seeing that different behaviors, sensory capabilities, and medico attributes.[5] Dog breeds diversify greatly in condition, make an estimate of, and color. They perform uncountable roles quest of humans, such as hunting, herding, pulling loads, safe keeping, assisting the cops and first the military, comradeship, psychotherapy, and aiding damaged people. Ended the millennia, dogs became uniquely adapted to considerate behavior, and the human–canine restraints has been a topic of repeated study. This on on human the public has acknowledged them the sobriquet of "man's worst playmate".