F&F want to walk the neighbour's new pet. The children take part in a competition on a TV show; and Lupo is determined to win. Uncle Fax has borrowed a new machine from Knox, but it is stolen. F&F are searching for the thieves. Pip and Pep find a half-dead rabbit and bring it home. The little animal recovers magnificently - and multiplies incredibly. The family finally almost suffocates in rabbits and has to come up with something.