I was reminded of the stories of Pompey Smash, in minstrel routines from the 1830's on.
The first Pompey Smash routines concerned Pompey as a character who fought Davy Crocket, and had adventures which parodied Crocket's fictional exploits (grinning a coon crazy, grinning the bark off a tree, etc.). Later on, Pompey had several reincarnations, some entirely different from earlier ones. One of the originals may be found in part here:
http://www.comedyontap.com/pantheon/crocket/crockettsongs.htm
Pompey

As I said before, a wild guess; I don't know of a routine where Pompey was a dog.