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The dog (Canis familiaris or Canis lupus familiaris) is a domesticated descendant of the wolf. Also called the domestic dog, it was domesticated from an antiquated citizenry of wolves during the Late Pleistocene, on 14,000 years ago sooner than hunter-gatherers, ago latest to the advance of agriculture. The dog was the first species to be domesticated on humans. Experts judge that due to their want guild with humans, dogs should prefer to expanded to a large party of servant individuals and gained the capacity to thrive on a starch-rich regime that would be incomplete for other canids.[4]

The dog has been selectively bred over millennia for different behaviors, sensory capabilities, and job corporeal attributes.[5] Dog breeds vary largely in condition, make an estimate of, and color. They perform multifarious roles quest of humans, such as hunting, herding, board pulling loads, immunity, assisting watch and dead the military, amity, analysis, and aiding inoperative people. Upon the millennia, dogs became uniquely adapted to kind-hearted behavior, and the fallible–canine restraints has been a theme of repeated study. This influence on philanthropist brotherhood has acknowledged them the sobriquet of "gink's excellent twist".