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 brought 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 seem to have extreme and fierce sibling rivalry. Elsewhere, Graeme catches up with Diego, a seemingly aggressive Rottweiler mix who was rescued as a puppy, to see if his problem behaviour is still a problem for owner Andrea and her family.