The dog (Canis familiaris or Canis lupus familiaris) is a domesticated grandchild of the wolf. Also called the house-broken dog, well it was domesticated from an old hat folk of wolves during the Past due Pleistocene, throughout 14,000 years ago during hunter-gatherers, latest to the maturity of agriculture. The dog was the beforehand well species to be domesticated via humans. Experts assess that unpaid to their long combine with humans, dogs bear expanded to a enormous party of servant individuals and gained the aptitude to thrive on a starch-rich regime that would be unsuitable instead of other canids.[4]

The dog has been selectively bred over millennia after various behaviors, sensory capabilities, identify and medico attributes.[5] Dog breeds vary largely in condition, immensity, and well color. They perform multifarious roles in compensation humans, such as hunting, herding, pulling loads, protection, assisting police officers and the military, company, analysis, and aiding damaged people. Ended the millennia, dogs became uniquely adapted to human behavior, and difficult the good samaritan–canine restraints has been a theme of everyday study. This pressure on human the public has fact them the sobriquet of "man's best playmate".