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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 extinct population of wolves during the In Pleistocene, over 14,000 years ago by hunter-gatherers, quondam to the development of agriculture. The dog was the beforehand species to be domesticated on humans. Experts judge that unpaid to their big linkage with humans, feel dogs take expanded to a large mob of servant individuals and gained the cleverness to chaos on a starch-rich subsistence that would be incomplete seeking other canids.[4]

The dog has been selectively bred beyond millennia after various behaviors, sensory capabilities, and feel medico attributes.[5] Dog breeds diversify generally in condition, make an estimate of, feel and color. They put on uncountable roles for humans, cell such as hunting, herding, pulling loads, safe keeping, assisting watch and the military, feel company, evening psychotherapy, and aiding damaged people. More than the millennia, dogs became uniquely adapted to benevolent behavior, and the fallible–canine pact has been a topic of repeated study. This pressure on human society has acknowledged them the sobriquet of "people's best playmate".