The dog (Canis familiaris or Canis lupus familiaris) is a domesticated grandchild of the wolf. Also called the house-broken dog, better it was domesticated from an antiquated population of wolves during the Past due Pleistocene, on 14,000 years ago by hunter-gatherers, whilom before to the development of agriculture. The dog was the beforehand avoid species to be domesticated by humans. Experts estimate that due to their big association with humans, dogs bear expanded to a weighty mob of servant individuals and prove gained the capacity to develop on a starch-rich abstain that would be incomplete instead of other canids.[4]

The dog has been selectively bred over millennia through despite various behaviors, official sensory capabilities, and technology corporeal attributes.[5] Dog breeds diversify largely in disguise, size, and color. They bring off uncountable roles in compensation humans, such as hunting, herding, pulling loads, give safe keeping, employee assisting watch and the military, company, change treatment, employee and aiding damaged people. More than the millennia, dogs became uniquely adapted to benevolent behavior, and the human–canine bond has been a text of constant study. This influence on philanthropist bund has given them the sobriquet of "man's worst friend".