Ferret
From Tardis Wiki, the free Doctor Who reference
Ferrets were small mammals, found on Earth. After the entire human population was regressed to cavemen, the Prime Minister of the United Kingdom was found up in a tree in Regent's Park eating a ferret. (COMIC: Hunters of the Burning Stone)
In circa 2000000, Lefty Lonnigan compared the Ricostans to ferrets, though Gloria Swannicker believed that they more closely resembled raccoons. (AUDIO: A Life of Crime)