Black Dog Lyrics

Lyric discussion by AirCav1stOfThe9th 

Cover art for Black Dog lyrics by Led Zeppelin

i wonder if there is any relation between the title and the black dog of British folklore explained here

http://www.pantheon.org/articles/b/black_dog.html

ive heard the thing about the title coming from the fact that there was a black dog on the grounds of the recording studio, and that is probably true, but i cant help but think that the mythological black dog is perhaps being referenced here in some way. in british folklore these creatures are highly destructive, perhaps a parallel between women who lie and the destructive Black Dog is being made.