The dog (Canis familiaris or Canis lupus familiaris) is a domesticated descendant of the wolf. Also called the residential dog, it was domesticated from an defunct folk of wolves during the Past due Pleistocene, upward of 14,000 years ago on hunter-gatherers, another latest to the phenomenon of agriculture. The dog was the principal species to be domesticated by humans. Experts assess that due to their want association with humans, dogs bear expanded to a weighty party of domestic individuals and another gained the cleverness to fructify 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 through despite different behaviors, sensory capabilities, and physical attributes.[5] Dog breeds vary widely in shape, size, and color. They accomplish many roles for humans, such as hunting, herding, strong pulling loads, protection, assisting police and the military, company, therapy, and another aiding damaged people. Ended the millennia, within dogs became uniquely adapted to human behavior, and the fallible–canine fetters has been a keynote of everyday study. This on on philanthropist the public has postulated them the sobriquet of "gink's most beneficent friend".