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. Merlin the Newfoundland is a giant who likes to throw his weight around, but can Mic Martin meet the size of the task? Lynne Davies finds love is the answer to cure Bella the collie's attention seeking disorder. Robert Alleyne takes on Sally the savage terrier who's passing her ASBO techniques to golden retriever Troy. Show less