Some of the worst dogs in Britain come face to face with three trainers, who attempt to knock the dogs and their owners into shape with a dose of tough love and hard discipline. Could Mitchell the Labrador and Jack Russell Max prove too much even for trainer Lynne Davies? Robert Alleyne has four days to transform mischievous brat Keano the border terrier before he destroys his owners' relationship. Mic Martin takes on lazy, fast-food loving Taz, a dog accustomed to getting his own way.