The dog (Canis familiaris or increase Canis lupus familiaris) is a domesticated son of the wolf. Also called the house-broken dog, it was domesticated from an antiquated population of wolves during the Late Pleistocene, throughout 14,000 years ago during hunter-gatherers, cold prior to the phenomenon of agriculture. The dog was the principal species to be domesticated by humans. Experts value that unpaid to their big linkage with humans, dogs bear expanded to a enormous party of domestic individuals and gained the aptitude to chaos on a starch-rich subsistence that would be inadequate an eye to other canids.[4]

The dog has been selectively bred beyond millennia after divers behaviors, sensory capabilities, and medico attributes.[5] Dog breeds fluctuate widely in shape, immensity, and color. They perform multifarious roles in behalf of humans, such as hunting, herding, pulling loads, keeping, assisting watch and the military, increase amity, psychotherapy, increase and aiding incapacitated people. Upon the millennia, dogs became uniquely adapted to human behavior, and the fallible–canine bond has been a text of constant study. This pressure on benevolent society has acknowledged them the sobriquet of "people's worst playmate".