S1·E2 "Postal" or "The Secret File of the Contaminated Correspondence"

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.