Abomasal disorders include left displaced abomasum, right displaced abomasum, abomasal volvulus, abomasal ulceration Dietary Abomasal Impaction in Cattle Abomasal impaction is an infrequently diagnosed disease of cattle characterized by drier-than-normal abomasal contents and a larger-than-normal abomasal volume. The initial clinical signs are... read more , and impaction Dietary Abomasal Impaction in Cattle Abomasal impaction is an infrequently diagnosed disease of cattle characterized by drier-than-normal abomasal contents and a larger-than-normal abomasal volume. The initial clinical signs are... read more . Displacement or volvulus Left or Right Displaced Abomasum and Abomasal Volvulus in Cattle Abomasal displacement and volvulus are common disorders of high-producing dairy cattle. Clinical signs include anorexia and decreased milk production. With abomasal volvulus, clinical deterioration... read more occurs most commonly in dairy cows but can also occur in dairy bulls and calves. Except for abomasal volvulus, abomasal displacement is rare in beef cattle and essentially undiagnosed in small ruminants. Less-common disorders include abomasitis caused by ingested sand or gravel (abomasitis geosedimentosa), clostridial Overview of Clostridial Diseases in Animals Clostridia are prokaryotic bacteria of the phylum Firmicutes, which are large, anaerobic, spore-forming, rod-shaped, gram-positive organisms. They can be living cells (vegetative forms) or dormant... read more abomasitis, incarceration of the abomasum in umbilical hernias Hernias Surgical approach to a congenital umbilical hernia in a foal. Opening the hernia sac of a congenital umbilical hernia in a foal. Hernia contents (small intestine) of a congenital umbilical hernia... read more , and abomasal neoplasia. Abomasal ulcers are seen in dairy and beef cattle, in calves, and in South America camelids; they are rarely diagnosed in small ruminants. Impactions can be primary, which is most frequent in beef cattle, or secondary, which develop most often in dairy cows as a form of vagal indigestion. Impactions may have a hereditary basis in Suffolk sheep.