A dear old friend of mine used to sing me this song, and I have been trying to find the lyrics for years.

The only part of a verse I can remember goes:

Johnny's mad and I am glad.
How do you know?
Johnny's mad and I am glad.
Who told you so?

The chorus goes something like:

Done Caught a rabbit, uh huh.
Done caught a rabbit, uh huh.
Done caught a rabbit, uh huh.
Done caught a rabbit, oh!