**[[Stomach and Abomasum - Anatomy & Physiology|Foregut fermenters]] recieve nearly all of their energy in the form of [[Volatile Fatty Acids - Anatomy & Physioogy|VFAs]], which have to be converted to glucose by gluconeogenesis in the liver to be able to be used by the brain. | **[[Stomach and Abomasum - Anatomy & Physiology|Foregut fermenters]] recieve nearly all of their energy in the form of [[Volatile Fatty Acids - Anatomy & Physioogy|VFAs]], which have to be converted to glucose by gluconeogenesis in the liver to be able to be used by the brain. |