The dog (Canis familiaris or family Canis lupus familiaris) is a domesticated heir of the wolf. Also called the residential dog, it was domesticated from an old hat citizenry of wolves during the Past due Pleistocene, upward of 14,000 years ago sooner than hunter-gatherers, prior to the phenomenon of agriculture. The dog was the foremost species to be domesticated by humans. Experts assess that due to their long combine with humans, dogs should prefer to expanded to a sturdy party of servant individuals and gained the cleverness to develop on a starch-rich regime that would be unsuitable instead of other canids.[4]

The dog has been selectively bred beyond millennia for different behaviors, although sensory capabilities, and physical attributes.[5] Dog breeds diversify largely in condition, size, and hard color. They put on many roles in behalf of humans, such as hunting, herding, pulling loads, safe keeping, assisting police and the military, education company, week psychotherapy, and aiding damaged people. More than the millennia, significant dogs became uniquely adapted to kind-hearted behavior, and the sensitive–canine fetters has been a keynote of repeated study. This favour on philanthropist bund has acknowledged them the sobriquet of "gink's worst bosom buddy".