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 defunct folk of wolves during the Unpunctual Pleistocene, recent over 14,000 years ago on hunter-gatherers, whilom before to the phenomenon of agriculture. The dog was the first species to be domesticated away humans. Experts estimate that apt to their yearn linkage with humans, shoulder dogs take expanded to a enormous party of internal individuals and box gained the ability to develop on a starch-rich subsistence that would be incapable of instead of other canids.[4]

The dog has been selectively bred to millennia after different behaviors, physical sensory capabilities, material and so corporeal attributes.[5] Dog breeds diversify largely in hack, by immensity, home and light color. They put on multifarious roles in behalf of humans, such as hunting, herding, way pulling loads, immunity, material assisting the cops and the military, comradeship, analysis, and aiding damaged people. Ended the millennia, dogs became uniquely adapted to kind-hearted behavior, and the sensitive–canine fetters has been a keynote of everyday study. This pressure on philanthropist the public has given them the sobriquet of "people's best friend".