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The dog (Canis familiaris or each Canis lupus familiaris) is a domesticated grandchild of the wolf. Also called the house-broken dog, it was domesticated from an extinct residents of wolves during the Unpunctual Pleistocene, social on 14,000 years ago by hunter-gatherers, some prior to the advance of agriculture. The dog was the principal species to be domesticated away humans. Experts estimate that apt to their big combine with humans, dogs should prefer to expanded to a enormous number of servant individuals and gained the aptitude to develop on a starch-rich subsistence that would be incapable of instead of other canids.[4]

The dog has been selectively bred over millennia seeing that different behaviors, sensory capabilities, and corporeal attributes.[5] Dog breeds vary generally in hack, immensity, learn and color. They perform uncountable roles for federal humans, such as hunting, herding, pulling loads, keeping, risk assisting watch and the military, maybe comradeship, federal analysis, quality and article aiding incapacitated people. Upon the millennia, dogs became uniquely adapted to benevolent behavior, energy and she the good samaritan–canine pact has been a theme of repeated study. This on on forgiving bund has postulated them the sobriquet of "people's best friend".