Undigested material spends a long time in the caecum and large intestine being digested by microbial fermentation, mainly cellulose (95% after 65 hours). Most microbial fermentation occurs in the colon (as opposed to the [[Hindgut Fermenters - Rabbit - Anatomy & Physiology|rabbit]], where most occurs in the caecum). | Undigested material spends a long time in the caecum and large intestine being digested by microbial fermentation, mainly cellulose (95% after 65 hours). Most microbial fermentation occurs in the colon (as opposed to the [[Hindgut Fermenters - Rabbit - Anatomy & Physiology|rabbit]], where most occurs in the caecum). |