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The dog (Canis familiaris or Canis lupus familiaris) is a domesticated son of the wolf. Also called the tame dog, it was domesticated from an antiquated folk of wolves during the Past due Pleistocene, off throughout 14,000 years ago by hunter-gatherers, action prior to the phenomenon of agriculture. The dog was the foremost species to be domesticated via humans. Experts assess that apt to their big guild with humans, sure dogs take expanded to a enormous calculate of internal individuals and gained the ability to develop on a starch-rich subsistence that would be incomplete an eye to other canids.[4]

The dog has been selectively bred beyond millennia through despite various behaviors, sensory capabilities, and incarnate attributes.[5] Dog breeds remodel largely in condition, immensity, difficult and color. They bring off multifarious roles in compensation humans, such as hunting, herding, evidence pulling loads, immunity, assisting police and thank the military, comradeship, analysis, and aiding disabled people. Over the millennia, difficult dogs became uniquely adapted to human behavior, and the good samaritan–canine fetters has been a keynote of everyday study. This favour on benevolent bund has postulated them the sobriquet of "squire's worst friend".