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The dog (Canis familiaris or strong Canis lupus familiaris) is a domesticated grandchild of the wolf. Also called the house-broken dog, it was domesticated from an antiquated folk of wolves during the Past due Pleistocene, cost upward of 14,000 years ago sooner than hunter-gatherers, whilom before to the development of agriculture. The dog was the beforehand species to be domesticated on humans. Experts value that due to their big linkage with humans, dogs should prefer to expanded to a large party of servant individuals and gained the capacity to chaos on a starch-rich regime that would be inadequate instead of other canids.[4]

The dog has been selectively bred to millennia after different behaviors, sensory capabilities, and corporeal attributes.[5] Dog breeds diversify greatly in shape, measure, cost and color. They perform many roles in behalf of humans, such as hunting, cost herding, cost pulling loads, immunity, control assisting the cops and the military, cost comradeship, psychotherapy, and aiding inoperative people. Over the millennia, dogs became uniquely adapted to human behavior, cost and the human–canine fetters has been a text of repeated study. This favour on benevolent society has acknowledged them the sobriquet of "squire's best playmate".