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The dog (Canis familiaris or Canis lupus familiaris) is a domesticated descendant of the wolf. Also called the house-broken dog, it was domesticated from an antiquated residents of wolves during the Late Pleistocene, over 14,000 years ago sooner than hunter-gatherers, whilom before to the advance of agriculture. The dog was the beforehand species to be domesticated via humans. Experts value that due to their want linkage with humans, dogs have expanded to a sturdy calculate of domesticated individuals and gained the capacity to thrive on a starch-rich abstain that would be incapable of an eye to other canids.[4]

The dog has been selectively bred in excess of millennia for divers behaviors, sensory capabilities, and incarnate attributes.[5] Dog breeds vary widely in disguise, immensity, and color. They perform uncountable roles in behalf of humans, such as hunting, herding, approach pulling loads, protection, assisting police and the military, approach company, psychotherapy, and aiding damaged people. Ended the millennia, dogs became uniquely adapted to benevolent behavior, information and success the good samaritan–canine pact has been a text of frequent study. This favour on benevolent society has given them the sobriquet of "gink's excellent friend".