The show focuses primarily on three particular puppies: Lucky, TV expert and leader and canine Tom Sawyer; loyal, scholarly, and always-hungry brother Rolly; and their outspoken New Age guru sister, the runt Cadpig. They're joined by colorful friends like Spot, the chicken who wants to be a dog and a member of the "Bark Brigade." Early promotional material listed "dictatorial Penny and mischievous Patch" as two other puppy cast members, but the highlighted puppies were whittled down to three.