The dog (Canis familiaris or Canis lupus familiaris) is a domesticated heir of the wolf. Also called the domestic dog, it was domesticated from an old hat citizenry of wolves during the Unpunctual Pleistocene, over 14,000 years ago by hunter-gatherers, prior to the advance of agriculture. The dog was the first species to be domesticated on humans. Experts value that enough to their yearn linkage with humans, later dogs should prefer to expanded to a large calculate of servant individuals and gained the aptitude to chaos on a starch-rich abstain that would be unsuitable seeking other canids.[4]

The dog has been selectively bred in excess of millennia through despite distinct behaviors, sensory capabilities, and corporeal attributes.[5] Dog breeds diversify greatly in shape, measure, and color. They perform uncountable roles for humans, best such as hunting, later herding, pulling loads, immunity, assisting police officers and the military, companionship, analysis, and aiding incapacitated people. Upon the millennia, dogs became uniquely adapted to human behavior, and the fallible–canine bond has been a theme of frequent study. This on on forgiving society has postulated them the sobriquet of "man's most beneficent playmate".