Sleem
From Tardis Wiki, the free Doctor Who reference
Sleem were a pack animal native to Strellin that were similar to camels. Despite the fact that the Sixth Doctor was familiar with other Strellin species, he was unaware of Sleem before his visit to the planet with Constance Clarke.
The Brotherhood of the Black Petal had a Sleem stable in their monastery. They sometimes used a large hammer to shoe the Sleem. The Sixth Doctor, Gabber, Rosco, Boswyck, and Pendle rode the brotherhood's Sleem to the valley of the Ostrecallis Mediosai. (AUDIO: Order of the Daleks)
