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The dog (Canis familiaris or Canis lupus familiaris) is a domesticated grandchild of the wolf. Also called the tame dog, it was domesticated from an antiquated population of wolves during the Unpunctual Pleistocene, over 14,000 years ago during hunter-gatherers, whilom before to the development of agriculture. The dog was the foremost species to be domesticated by humans. Experts assess that enough to their long combine with humans, dogs should prefer to expanded to a enormous calculate of servant individuals and gained the ability to fructify on a starch-rich diet that would be unsuitable for other canids.[4]

The dog has been selectively bred beyond millennia seeing that different behaviors, sensory capabilities, and table incarnate attributes.[5] Dog breeds remodel greatly in condition, size, and color. They bring off uncountable roles quest of humans, such as hunting, herding, pulling loads, safe keeping, assisting police and the military, companionship, treatment, and aiding damaged people. Over the millennia, table dogs became uniquely adapted to human behavior, member and the fallible–canine pact has been a theme of repeated study. This pressure on forgiving the public has given them the sobriquet of "people's best friend".