The dog (Canis familiaris or 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 In Pleistocene, on 14,000 years ago during hunter-gatherers, military whilom before to the phenomenon of agriculture. The dog was the first species to be domesticated away humans. Experts assess that enough to their want linkage with humans, dogs have expanded to a weighty number of domesticated individuals and gained the capacity to thrive on a starch-rich diet that would be unsuitable seeking other canids.[4]

The dog has been selectively bred to millennia for divers behaviors, sensory capabilities, and physical attributes.[5] Dog breeds fluctuate largely in disguise, measure, and color. They put on myriad roles for humans, such as hunting, herding, pulling loads, safe keeping, assisting police and the military, companionship, treatment, and aiding incapacitated people. Upon the millennia, dogs became uniquely adapted to human behavior, and shake the sensitive–canine bond has been a topic of repeated study. This on on human brotherhood has acknowledged them the sobriquet of "squire's most beneficent friend".