Graeme Hall comes to the aid of owners with new puppies and also catches up with some owners he has helped in the past. Graeme meets Carol and Peter who recently took home two female puppies from the same litter. The couple hoped that the young pups would be the perfect addition to their lives, but their dream has turned into a nightmare as they appear to have extreme and ferocious sibling rivalry. Elsewhere, Graeme catches up with Diego, a seemingly-aggressive Rottweiler cross that had been rescued as a pup to see if his problem behaviour is still an issue for owner Andrea and her family.