AMEN to the advice to avoid sugars, especially in sweet feeds or furans in grass. For an older horse who might be subject to Cushings, getting the blood tests for hormone levels is important. Years ago I got rid of all sweet feeds, went to low carbohydrate extruded feed and the benefits included the birds left my barn and quit sorting thru manure for seeds that had not been digested (money wasted). Your natural trimming farrier recommends moisture for coronary bands, as does mine. I have a mare who cannot go on grass of any sort, so I get a good hand lotion (no preservatives), add lanolin and moisturize her coronary bands as needed. My farrier has shown me how to evaluate her needs, as lately we are having tons of rain and her arena turnout has good moisture (for now).