Jack is upset at having to go to school. But soon he is busy making new friends and avoiding the bully Doberman, Sweetcakes.

The local vet is hanging around Barkley School, and the dogs aren't too thrilled. Blondie thinks that the doc is there to see Fred -- it's more than puppy love for those two humans! But when Tazz gets hurt, having a doctor nearby is the best thing for all the dogs at Barkley.

The Barkley's School for Dogs will be marching in the town's 100th anniversary parade...and so will another neighborhood canine school, Howl's Dog City. Jack and his friends are set on outshining their rivals. But having fun and getting along beats competition, paws down!

When chew toys start to disappear and doggie treats are missing from the schoolyard, the Barkley dogs are suspicious. Could it be Sweetcakes, the bully Doberman, playing her old tricks? Jack learns that the true culprit may have to do with an old legend of a ghost dog...

The dogs at Barkley's School for Dogs sense there is something wrong about the search for a top dog to be used in a TV commercial.

Floyd is forced to ear a big plastic collar after getting stitches, and Sweetcakes teases him unmercifully. Floyd is terribly depressed! Jack just can't stand by and let Floyd suffer, so he and his doggie sidekicks teach Sweetcakes a lesson.

Harry the Westie is tattletaling on the other dogs and getting them in trouble. Harry's behavior is getting out of hand, and soon his schoolmates are upset. Jack helps Harry learn a lesson about good and bad tattling.

Jack, the wonder dog, tries hard to fit in and make new friends at his new school while staying clear of the bully Doberman, Sweetcakes. But when Jack chooses one of the bully's toys to chew on and befriends a cat, he comes to realize the power of friendship.

At Barkley's school for dogs, a friendly canine named Jack becomes concerned when a new puppy begins learning the mean ways of Sweetcakes, the school's Doberman bully.

Floyd has to wear a special collar after he hurts his nose. He feels sad that he can't play like the rest of the dogs. How can Jack and his friends cheer up Floyd?