Lee Roy Parnell (feat. Kevin McKendree on piano) "Milk Cow Blues"

Lee Roy Parnell does a stellar rendition of "Milk Cow Blues" on an episode of Austin City Limits from 1996.  He combines lyrics from the original performed by Robert Johnson, and written by Kokomo Arnold who wrote and performed the tune, with lyrics that were added later in country music renditions recorded by Bob Wills, and his brother, Johnny Lee Wills.  Johnny Lee Wills recorded it before Bob Wills did, incidentally.

Other artists have taken a shot at recording the tune, too.  Here's a history.

http://en.wikipedia.org/wiki/Milk_Cow_Blues_%28song%29

Dig this!