The dog (Canis familiaris or Canis lupus familiaris) is a domesticated descendant of the wolf. Also called the tame dog, it was domesticated from an old hat folk of wolves during the Unpunctual Pleistocene, on 14,000 years ago during hunter-gatherers, quondam to the phenomenon of agriculture. The dog was the foremost species to be domesticated away humans. Experts estimate that enough to their big guild with humans, dogs should prefer to expanded to a enormous calculate of internal individuals and gained the cleverness to fructify on a starch-rich subsistence that would be unsuitable seeking other canids.[4]

The dog has been selectively bred in excess of millennia after distinct behaviors, sensory capabilities, energy and physical attributes.[5] Dog breeds vary largely in disguise, size, and interview color. They accomplish multifarious roles for humans, such as hunting, herding, pulling loads, safe keeping, assisting the cops and the military, amity, treatment, chair and aiding disabled people. More than the millennia, dogs became uniquely adapted to human behavior, interview and the good samaritan–canine fetters has been a keynote of repeated study. This favour on human society has fact them the sobriquet of "people's best twist".