[2][3][4][5] Though officially credited solely to Osbourne, "Bark at the Moon" was co-written with guitarist Jake E. Lee and bassist/lyricist Bob Daisley.

Daisley has stated that he accepted a buyout from Osbourne in exchange for all writing credits on the album.

"[8] Lyrically, the song deals with a creature of some sort who once terrorized a town, was killed, and later mysteriously returned to once again wreak havoc upon the villagers.

The music video, however, borrows heavily from Robert Louis Stevenson's classic Dr. Jekyll and Mr. Hyde story, depicting Osbourne as a "mad scientist" who ingests a substance in his laboratory which causes him to transform into the werewolf depicted on the Bark at the Moon album cover.

Drummer Tommy Aldridge played on the studio recording of the track, but the video features his replacement in the band, Carmine Appice.