There was an old man from Milwaukee

There are more than 120,000 people in the U.S. waiting for an organ transplant and not enough donors. The dire shortage has led some researchers to consider an unusual solution: They are breeding genetically modified pigs whose organs could be compatible for human transplant.

There was an old man from Milwaukee
whose liver was bloated and balky.
He went to the store
to buy a fine boar;
now he goes ‘oink’ and feels cocky!