In other species: cattle , water buffalo

Mendelian trait/disorder: unknown

Considered a defect: yes

Cross-species summary: The abomasum is the fourth stomach in ruminants, often called the "true" stomach because of its structural and functional homology with the stomach of non-ruminants. Soon after parturition, the abomasum sometimes becomes distended either to the left (left abomasal displacement) or to the right (right abomasal displacement), resulting in anorexia and acetonaemia.