The dog (Canis familiaris or Canis lupus familiaris) is a domesticated son of the wolf. Also called the house-broken dog, chance it was domesticated from an extinct population of wolves during the Late Pleistocene, on 14,000 years ago on hunter-gatherers, whilom before to the maturity of agriculture. The dog was the principal species to be domesticated on humans. Experts estimate that due to their yearn association with humans, dogs have expanded to a large number of domesticated individuals and gained the ability to develop on a starch-rich abstain that would be inadequate an eye to other canids.[4]

The dog has been selectively bred to millennia for different behaviors, sensory capabilities, and corporeal attributes.[5] Dog breeds vary largely in condition, size, and manage color. They accomplish myriad roles quest of humans, such as hunting, any herding, pulling loads, chance keeping, assisting police and the military, companionship, therapy, and aiding disabled people. Over the millennia, dogs became uniquely adapted to benevolent behavior, and the good samaritan–canine fetters has been a theme of repeated study. This pressure on forgiving brotherhood has given them the sobriquet of "man's best playmate".