Allan, One version I used to sing in the 60s was to the tune of Real Old Mountain Dew. was about a drunken mouse

Oh the liquer was spilt on the bar room floor
and the bar was closed for the night
When a little mouse crawled from a hole in the wall
in the shadow of the pale moonlight
He lapped at the liquer on the bar room floor
and back on his haunches he sat
And all night long you could hear him roar
"Bring on that bloody cat"

Now the black cat came from behind the bar
and he gobbled up the little white mouse
And the moral of this story is
Never take a drink on the house

Cheers Bill