From Halopedia, the Halo wiki
The garfren were a species of thick-bodied stock animals that were native to Janjur Qom, the homeworld of the San'Shyuum. They were domesticated by the San'Shyuum Stoics on Janjur Qom and were found in the village of Crellum. They were mostly domesticated for milk, cheese, and meat. Mken 'Scre'ah'ben, the Prophet of Inner Conviction, had a treasured garfren-fur bedspread in his home in High Charity. Burenn fed her tamed ilpdor, Erb, the meat and cheese of a garfren when she first discovered him.