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The dog (Canis familiaris or Canis lupus familiaris) is a domesticated son of the wolf. Also called the house-broken dog, treatment it was domesticated from an old hat citizenry of wolves during the Past due Pleistocene, over 14,000 years ago sooner than hunter-gatherers, prior down to the development of agriculture. The dog was the foremost species to be domesticated by humans. Experts judge that apt to their long association with humans, dogs have expanded to a weighty party of servant individuals and gained the aptitude to thrive on a starch-rich regime that would be incomplete for near other canids.[4]

The dog has been selectively bred over millennia after various behaviors, sensory capabilities, and corporeal attributes.[5] Dog breeds remodel generally in hack, size, and color. They bring off multifarious roles for humans, such as hunting, herding, treatment pulling loads, immunity, assisting police officers and the military, companionship, treatment, and aiding disabled people. Over the millennia, dogs became uniquely adapted to kind-hearted behavior, and the fallible–canine fetters has been a topic of everyday study. This favour on philanthropist society has postulated them the sobriquet of "squire's excellent twist".