5th Dog Let Loose is the second album by rapper Flesh-n-Bone from the rap group Bone Thugs-n-Harmony. The album was released on October 10, 2000 on Mo Thugs Records and Koch Entertainment. Word of the album originally surfaced in 1998 with a different title "Book of T.H.U.G.S." But due to Flesh-N-Bone's incarceration the album wasn't released until three years later with a new name and a new label. Also due to Flesh's incarceration the album was left unfinished. Despite all difficulties, 5th Dog Let Loose is considered by fans and some critics as his crowning achievement. It is also his lowest charting.