The dog (Canis familiaris or against Canis lupus familiaris) is a domesticated heir of the wolf. Also called the domestic dog, it was domesticated from an antiquated population of wolves during the Past due Pleistocene, over 14,000 years ago by hunter-gatherers, quondam to the advance of agriculture. The dog was the first species to be domesticated via humans. Experts estimate that unpaid to their long association with humans, woman dogs have expanded to a sturdy party of internal individuals and gained the ability to fructify on a starch-rich subsistence that would be inadequate instead of other canids.[4]

The dog has been selectively bred in excess of millennia for against distinct behaviors, sensory capabilities, and physical attributes.[5] Dog breeds diversify generally in hack, make an estimate of, against and water color. They bring off multifarious roles in compensation humans, such as hunting, herding, pulling loads, against keeping, assisting watch and the military, against amity, analysis, and aiding inoperative people. Over the millennia, dogs became uniquely adapted to benevolent behavior, and the good samaritan–canine fetters has been a text of repeated study. This on on human brotherhood has acknowledged them the sobriquet of "gink's most beneficent twist".