Ralph is alerted by the secret headquarters that a strange epidemic of people hating their dogs is spreading around, and he seeks the help of French poodle, Agent Noodle, the master of fuzzy logic. Once Agent Noodle discovers that the epidemic is being spread by a strange chemical in the human snack foods, Ralph, Noodle, and Mitzy travel to Angus' Labratory, where Ralph undergoes scrupulous training to go undercover as a cat at the Notneb Kitty-Litter Factory, where there's been rumors of cats roaming around. While there, Ralph discovers that the cats are putting the chemical, K-9, in the snack foods, and is joined by Mitzy and other spy dogs to defeat the cats.

It all starts when Ralph suddenly notices a pattern in the mail that his owners are receiving: everything is a "You've won ten million dollars!" mailer. He also notices a strange slime on the envelopes, and sends the data off to the secret headquarters. He then receives word that the slime is from the evil Space

It all starts when the flea nation steals a truck load of the government's hair growth chemical. Ralph is contacted about the missing chemical. He then, using his high tech TV, finds that the fleas are aboard a blimp floating above the local baseball stadium during the big game. So Ralph, with the help of Scribble, Mitzy, Frank, and Angus' floppy foam hats, have to put a stop to the fleas evil plans of making the dirty, long haired, nail biting fans in to big fuffy balls of perfect living conditions for the fleas.

All dogs are supposed to take pictures of their owners homework to send in for examination in case of any harmful formulas or equations. Von Rabie missed sending his little Shiela's homework because she got in trouble for lying. After being contacted, Von Rabie sends in the homework pictures. But then it is discovered that Shiela made a formula that would help restaurants serve the correct amount of food to each individual person.

Someone is stealing the worlds supply of beef. Which means that all the dogs are having to eat veggies! Apparently the baddie is hypnotizing the cows with radioactive cud. So it's up to Ralph and the crew to dispose of the cruddy cud.