NAF LTSHI Mud Guard Supplement. Nutritional support for skin challenged by wet, muddy conditions. When exposed to wet muddy conditions, some horses can be affected by soil dwelling bacteria that gain access into the skin when weakened by the external conditions. By improving the diet we can help the horse to strengthen his skin from the inside out. Mud Gard contains a unique complex of scientifically verified, naturally sourced antioxidants to flush excess free radicals away from the areas affected by the ravages of the mud. It also contains key herbs and other nutrients, including MSM, to support strong healthy skin from within. For optimum nutritional support improve the diet with Mud Gard prior to the onset of wet, muddy conditions to allow the key nutrients to assimilate in the system.