Trude Mostue refuses to let her anxiety about her application to the Garston Veterinary Group affect her concentration when performing a life-saving operation on a Labrador named Jenny. Meanwhile, Joe Inglis has to deal with the nastiest job of his career to-date. Pepe the cat has been missing for a week and has returned in deep distress and stinking the place out. It transpires that his bottom has been infected with maggots which have eaten away at the flesh.