Jo and Steve are at loggerheads over their rescue dog Theo. According to Steve, Theo's perfect exactly as he is and should be treated as such. But Jo struggles with Theo's intense reactions to strangers and apparent obsession with destroying balls. Can trainer Kamal help these two owners get things squared for the good of their beloved dog? French bulldog Benny is another obsessed pup. Benny's eyes darken as he goes into attack mode whenever cleaning products come out. What's troubling Benny? And what's made cavapoo Parker so fearful?

Dawn and Don dote on their rescue dog Buddy, but even they can't ignore the threat he poses to any delivery driver who comes to the door. He's bitten two and now even locked doors can't restrain him. Expert Jo takes them all on a crash-course to see if they can fix their communication problem. Great Dane puppy Sid needs to learn some manners on the lead. His owners Mark and Angela are overpowered and out of ideas so they seek advice on how to get their 'big baby' under control.