Rudi crushes Herman's claim at the title of biggest bunny, but even he wasn't the heftiest hopper in the competitions.
That honour could go to Robert, who's owned by Karl Szmolinsky, and has reached a massive 9.2kg.
German Giants do not exist in the wild, but have been developed by breeders.
They need to weigh at least 7kg to qualify for the breed, and can live for as long as 12 years.