The versions I learned in the early 50s were

Not last night but the night before,
Three old tomcats came knocking on the door,
One had whisky, one had rum,
and one had a pancake stuck to it's bum


There was a little man
and he had a little gun
and his bullets were made of lead, lead, lead
He went to the brook
And he shot a little duck
Right through the middle of his head, head, head