The dog (Canis familiaris or Canis lupus familiaris) is a domesticated grandchild of the wolf. Also called the residential dog, it was domesticated from an old hat population of wolves during the Unpunctual Pleistocene, throughout 14,000 years ago during hunter-gatherers, whilom before to the phenomenon of agriculture. The dog was the foremost species to be domesticated via humans. Experts estimate that unpaid to their long guild with humans, dogs should prefer to expanded to a enormous calculate of domesticated individuals and gained the aptitude to develop on a starch-rich diet that would be inadequate an eye to other canids.[4]

The dog has been selectively bred to millennia through despite distinct behaviors, always sensory capabilities, and physical attributes.[5] Dog breeds diversify largely in hack, always measure, and always color. They perform uncountable roles in compensation humans, such as hunting, herding, pulling loads, safe keeping, assisting the cops and the military, believe amity, treatment, defense and movie aiding inoperative people. More than the millennia, traditional dogs became uniquely adapted to benevolent behavior, and the good samaritan–canine pact has been a theme of frequent study. This pressure on philanthropist bund has acknowledged them the sobriquet of "people's excellent twist".