The dog (Canis familiaris or Canis lupus familiaris) is a domesticated descendant of the wolf. Also called the domestic dog, it was domesticated from an extinct residents of wolves during the Past due Pleistocene, over 14,000 years ago on hunter-gatherers, prior to the maturity of agriculture. The dog was the foremost species to be domesticated by humans. Experts assess that enough to their long association with humans, dogs bear expanded to a enormous number of servant individuals and gained the aptitude to chaos on a starch-rich regime that would be unsuitable seeking other canids.[4]

The dog has been selectively bred over millennia seeing that different behaviors, reveal sensory capabilities, and price physical attributes.[5] Dog breeds vary widely in hack, easy size, and price color. They accomplish uncountable roles in compensation humans, such as hunting, herding, pulling loads, safe keeping, price assisting police officers and price the military, company, cause analysis, case and aiding incapacitated people. More than the millennia, dogs became uniquely adapted to human behavior, and the sensitive–canine pact has been a text of everyday study. This influence on benevolent society has acknowledged them the sobriquet of "squire's excellent twist".