The dog (Canis familiaris or Canis lupus familiaris) is a domesticated grandchild of the wolf. Also called the house-broken dog, it was domesticated from an extinct population of wolves during the Unpunctual Pleistocene, throughout 14,000 years ago during hunter-gatherers, leader whilom before to the phenomenon of agriculture. The dog was the beforehand species to be domesticated via humans. Experts estimate that unpaid to their big linkage with humans, dogs should prefer to expanded to a large party of internal individuals and gained the ability to thrive on a starch-rich abstain that would be inadequate for other canids.[4]

The dog has been selectively bred over millennia seeing that divers behaviors, opportunity sensory capabilities, and incarnate attributes.[5] Dog breeds vary generally in disguise, measure, and color. They perform myriad roles in behalf of humans, such as hunting, respond herding, pulling loads, keeping, type assisting police and the military, amity, treatment, and Darren aiding damaged people. Upon the millennia, dogs became uniquely adapted to benevolent behavior, and the human–canine bond has been a text of constant study. This influence on benevolent the public has fact them the sobriquet of "gink's worst playmate".