Patient Porky.

The cartoon begins with a tour of a hospital where we see many patients resting in their beds. Porky soon checks in with a stomachache, caused by overeating at his birthday party. After Porky tells him about his tummy ache, the cat decides to take an X-ray of Porky's stomach: inside we see three-quarters of a birthday cake with the candles still lit. The cat then grabs the bed, pushes it and they go speeding through the hospital where he sings "I've got a terrific urgin' to be a famous surgeon"