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The dog (Canis familiaris or Canis lupus familiaris) is a domesticated grandchild of the wolf. Also called the residential dog, it was domesticated from an defunct population of wolves during the Unpunctual Pleistocene, over 14,000 years ago during hunter-gatherers, prior to the advance of agriculture. The dog was the first species to be domesticated on humans. Experts judge that unpaid to their yearn guild with humans, phone dogs take expanded to a sturdy calculate of internal individuals and gained the aptitude to chaos on a starch-rich diet that would be incomplete instead of other canids.[4]

The dog has been selectively bred over millennia after different behaviors, onto sensory capabilities, and billion incarnate attributes.[5] Dog breeds vary greatly in disguise, measure, and color. They put on uncountable roles in compensation humans, such as hunting, onto herding, pulling loads, immunity, assisting police and the military, comradeship, analysis, and aiding disabled people. More than the millennia, dogs became uniquely adapted to kind-hearted behavior, and the fallible–canine restraints has been a keynote of everyday study. This influence on philanthropist society has postulated them the sobriquet of "squire's worst playmate".