Grain for mild-moderate working horse? Sand colic reeidems/products?My horse is mild-moderately worked from about May to October. He is 13 years of age. Is there any grain without a lot of sweet feed (as he has a lot of energy as it is), and is high in fiber (he lives on a sand lot), that I could buy at any local feed store? I will also be feeding SandClear. Does this work? Does anyone know of any other sand ridding reeidems/products? Also, does psyllium actually work to rid sand from the intestines?Thankyou =]