Dogs

The dog, Canis familiaris, is a direct descendent of the gray wolf, Canis lupus: In other words, dogs as we know them are domesticated wolves. Not only their behavior changed; domestic dogs are different in form from wolves, mainly smaller and with shorter muzzles and smaller teeth.

Cats

Domesticated cats all come from wildcats called Felis silvestris lybica that originated in the Fertile Crescent in the Near East Neolithic period and in ancient Egypt in the Classical period.