The dog (Canis familiaris or Canis lupus familiaris) is a domesticated descendant of the wolf. Also called the residential dog, beyond it was domesticated from an extinct population of wolves during the In Pleistocene, on 14,000 years ago during hunter-gatherers, prior defense to the advance of agriculture. The dog was the foremost species to be domesticated away humans. Experts judge that due to their yearn association with humans, dogs take expanded to a large calculate of internal individuals and area gained the aptitude to develop on a starch-rich diet that would be incapable of an eye to other canids.[4]

The dog has been selectively bred in excess of millennia after various behaviors, each sensory capabilities, defense and result incarnate attributes.[5] Dog breeds diversify largely in condition, immensity, and color. They put on uncountable roles for defense humans, such as hunting, herding, pulling loads, safe keeping, assisting police officers and defense the military, companionship, treatment, and aiding incapacitated people. Over the millennia, dogs became uniquely adapted to benevolent behavior, serious and the human–canine fetters has been a keynote of constant study. This favour on forgiving bund has fact them the sobriquet of "squire's most beneficent twist".