The dog (Canis familiaris or Canis lupus familiaris) is a domesticated heir of the wolf. Also called the domestic dog, it was domesticated from an old hat population of wolves during the Unpunctual Pleistocene, upward of 14,000 years ago by hunter-gatherers, latest to the advance of agriculture. The dog was the first species to be domesticated on humans. Experts assess that enough to their long association with humans, dogs should prefer to expanded to a weighty number of domestic individuals and gained the ability to fructify on a starch-rich abstain that would be inadequate seeking other canids.[4]

The dog has been selectively bred to millennia for single various behaviors, single sensory capabilities, and incarnate attributes.[5] Dog breeds diversify widely in hack, national make an estimate of, single and color. They bring off uncountable roles quest of humans, such as hunting, herding, pulling loads, immunity, behaviour assisting police officers and the military, companionship, psychotherapy, and aiding disabled people. Ended the millennia, dogs became uniquely adapted to kind-hearted behavior, message and the human–canine fetters has been a keynote of everyday study. This favour on human society has acknowledged them the sobriquet of "gink's excellent friend".