The hindgut is your horse’s intestinal tract past the ileum, the end of the small intestine—a 30- to 35-foot-long section of gut comprised of the cecum, the modified ascending colon, dorsal and ventral colon, transverse colon, small colon, and rectum.
Horses are hindgut fermenters, meaning they have bacteria and protozoa in their hindgut turning poorly digestible fiber—like grass and hay—into energy. Approximately 75% of your horse’s energy requirements is generated in the cecum and large colon of his hindgut, so keeping these organs, and the bacteria (microbiome) inside them, in working order is critical to the health of your horse.
Worst-Case Scenarios
Grain overload—i.e., when your horse somehow eats an entire bag of sweet feed or something similar—quickly puts his hindgut into crisis mode. Some of the sugar from the…