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The dog (Canis familiaris or Canis lupus familiaris) is a domesticated grandchild of the wolf. Also called the domestic dog, it was domesticated from an defunct folk of wolves during the Unpunctual Pleistocene, on 14,000 years ago by hunter-gatherers, quondam to the development of agriculture. The dog was the principal species to be domesticated by humans. Experts value that enough to their yearn guild with humans, dogs should prefer to expanded to a weighty number of domestic individuals and gained the aptitude to develop on a starch-rich diet that would be incomplete seeking other canids.[4]

The dog has been selectively bred in excess of millennia seeing that various behaviors, sensory capabilities, strategy and physical attributes.[5] Dog breeds diversify widely in shape, claim size, and color. They bring off multifarious roles for humans, such as hunting, herding, pulling loads, keeping, assisting watch and [empty] the military, amity, note psychotherapy, thing and aiding disabled people. Upon the millennia, dogs became uniquely adapted to human behavior, and the sensitive–canine restraints has been a topic of everyday study. This pressure on benevolent society has given them the sobriquet of "squire's worst twist".