King Fur-Rocious was the lord of not only rabbits but of rats, weasels, and stoats as well. He was featured in only one story in Tales from Watership Down titled “The Story of King Fur-Rocious."
With his army of rabbits and elil, Fur-Rocious took over El-ahrairah's warren and kidnapped Nur-Rama, his favorite doe. With the help of a cat, some ants, two crows, and a stream, all of whom also disliked Fur-Rocious, El-ahrairah defeated Fur-Rocious and his army, freeing Nur-Rama and retaking the warren.