The dog (Canis familiaris or Canis lupus familiaris) is a domesticated heir of the wolf. Also called the residential dog, it was domesticated from an old hat population of wolves during the Past due Pleistocene, upward of 14,000 years ago sooner than hunter-gatherers, chair latest to the phenomenon of agriculture. The dog was the first species to be domesticated by humans. Experts assess that due to their big linkage with humans, dogs bear expanded to a enormous party of domesticated individuals and gained the cleverness to thrive on a starch-rich regime that would be inadequate seeking other canids.[4]

The dog has been selectively bred to millennia seeing that various behaviors, sensory capabilities, and fire incarnate attributes.[5] Dog breeds vary generally in disguise, size, and color. They perform many roles in behalf of humans, such as hunting, herding, focus pulling loads, focus protection, assisting police and the military, black amity, focus analysis, and aiding disabled people. Ended the millennia, wall dogs became uniquely adapted to human behavior, four and focus the good samaritan–canine pact has been a text of everyday study. This pressure on benevolent society has given them the sobriquet of "man's most beneficent friend".