Overconsumption of carbohydrates, usually in the form of high-starch concentrates or fructan-rich pastures, can result in subclinical hindgut acidosis. Subclinical acidosis is a condition in which the pH of the horses hindgut becomes too acidic. Horses w subclinical acidosis often perform far below expectations. Subclinical acidosis might be the underlying cause for decreased feed intake or complete inappetence in severe cases, mild to moderate colic signs of unexplained origin, poor feed efficiency and subsequent weight losee, and onset of vices such as wood chewin, weaving and stall walking. Just mix into horses grain