That Fat Cat is, well, fat. He can't even see his toes anymore. He loves food and sleeping too much! He eats biscuits and pies, sausage and peas. He simply gorges on milk and cheese. All that eating makes him sleepy, so much so that he can't even do his only job, to chase away the mice. The other household pets know something must be done! While That Fat Cat naps, the mice take away all the food in the house. Butch the Dog, a retired champion racing greyhound, takes it upon himself to train That Fat Cat to live a healthier lifestyle. That Fat Cat must change his ways!