The tune is simple enough that I figured it out on the mandolin.

In case someone needs the words, here they are.

FOUR WET PIGS
(Greg Brown)

Here's a little song about four wet pigs
Here's a little song about four wet pigs
Two of them little and two of them big
Danced all night to the pig town jig

Two little pigs were just half grown
Two little pigs were big as a barn
Big as a barn, tall as a tree
Send 'em off to the factory

Slice 'em into bacon, cut 'em into ham
Squeeze 'em into sausage, grind 'em into SPAM
Throw their little eyes out in the rain
Pickle their feet and scramble their brains

Here's a little song about two wet pigs
Leanin' on the hog trough smokin' their cigs
Prayin' to God that they don't get big
Danced all night to the pig town jig
^^^