I heard Roy Book Binder do a song called Black Dog Blues, but I am not sure who he attributed it to. I'll check it out. Two of the verses were:

You called me a dog, when I went away
You called me your big black dog
When I cam home with a ten dollar bill
You said, "Daddy, where you been so long?"

I've been all around Kentucky
I've been all around Tennessee
Every where I lay my head down
That was home to me

This song is a rag with the same chord structure as Rag Mama - A D7 G C -