Dog

The domestic dog is the 18-31,000 year old descendant of a now extinct European Wolf... The term "domestic dog" is generally used for both domesticated and feral varieties. The dog was the first domesticated animal and has been the most widely kept working, hunting, and pet animal in human history. ... Most breeds of dog are at most a few hundred years old, having been artificially selected for particular morphologies and behaviors by people for specific functional roles. [Dog. Wikipedia]