A team of expert trainers, along with dog-dad-of-two Nick Grimshaw, come together to take on the nation's naughtiest dogs... and their humans. Tim and Chelsey have been showing their love for bulldog Bobby through food. Trouble is, now he can't walk. Or is it more a matter of won't walk? Victoria doesn't sugar-coat her conclusions. Older dog Harley and puppy Jack can't stand the sight of each other, and owners Lynn and Dean are stuck in the middle. With the serious risk of injury hanging over the family, expert Jo has a challenge on her hands. Meanwhile, first-time dog owner Natalie is struggling with nervous mega-yapper Milo, a miniature dachshund.