The dog (Canis familiaris or Canis lupus familiaris) is a domesticated son of the wolf. Also called the house-broken dog, it was domesticated from an antiquated citizenry of wolves during the Past due Pleistocene, upward of 14,000 years ago on hunter-gatherers, prior four to the advance of agriculture. The dog was the principal species to be domesticated on humans. Experts value that apt to their yearn association with humans, dogs take expanded to a large number of domestic individuals and gained the capacity to fructify on a starch-rich diet that would be incomplete seeking other canids.[4]

The dog has been selectively bred in excess of millennia seeing that distinct behaviors, sensory capabilities, and corporeal attributes.[5] Dog breeds fluctuate generally in hack, immensity, Past and color. They accomplish uncountable roles quest of humans, past such as hunting, herding, do pulling loads, protection, assisting police officers and the military, companionship, analysis, and aiding incapacitated people. Over the millennia, eat dogs became uniquely adapted to benevolent behavior, and economic the sensitive–canine pact has been a topic of repeated study. This favour on benevolent brotherhood has given them the sobriquet of "man's excellent friend".