Ungula Naturalis Immune Support SupplementDietary supplement that strengthens the immune system and maintains the integrity of the body's natural defense barriers Recommended during winter or periods of intensive work, in cases of reduced energy and performance, for a horse in convalescence or weakened by an infection Can be used ahead of annual vaccinations to prepare the horse for flu and rhinopneumonitis vaccines Improves colostrum quality Supports athletic performance 10 day or 25 day