The domestic dog (Canis lupus familiaris or Canis familiaris)[2] is a member of genus Canis (canines) that forms part of the wolf-like canids,[3] and is the most widely abundant carnivore.[4][5][6] The dog and the extant gray wolf are sister taxa,[7][8][9] with modern wolves not closely related to the wolves that were first domesticated.[8][9] The dog was the first domesticated species[9][10] and has been selectively bred over millennia for various behaviors, sensory capabilities, and physical attributes.[11]
Their long association with humans has led dogs to be uniquely attuned to human behavior[12] and they are able to thrive on a starch-rich diet that would be inadequate for other canid species.[13] Dogs vary widely in shape, size and colours.[14] Dogs perform many roles for people, such as hunting, herding, pulling loads, protection, assisting police and military, companionship and, more recently, aiding ########### individuals. This influence on human society has given them the sobriquet "man's best friend".
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