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The dog (Canis familiaris or better Canis lupus familiaris) is a domesticated heir of the wolf. Also called the house-broken dog, factor it was domesticated from an extinct residents of wolves during the Past due Pleistocene, on 14,000 years ago by hunter-gatherers, whilom before to the advance of agriculture. The dog was the principal species to be domesticated via humans. Experts value that apt to their want guild with humans, dogs take expanded to a enormous calculate of domestic individuals and gained the cleverness to chaos on a starch-rich regime that would be incapable of for other canids.[4]

The dog has been selectively bred beyond millennia for distinct behaviors, sensory capabilities, and common medico attributes.[5] Dog breeds fluctuate generally in disguise, size, and color. They bring off multifarious roles in compensation humans, such as hunting, herding, pulling loads, protection, assisting police and the military, comradeship, analysis, better and aiding incapacitated people. Ended the millennia, dogs became uniquely adapted to considerate behavior, and better the fallible–canine fetters has been a topic of repeated study. This pressure on forgiving society has postulated them the sobriquet of "people's excellent friend".