Herbal Wormer for HorsesThe herbs used in this combination are for the maintenance of a healthy and naturally worm and parasite free system. This combination works by simply maintaining an environment which is not welcoming to parasites and worms; they are opportunistic and need an unclean environment to thrive. This product may be beneficial in: Underweight Parasites in manure Rough hair coat Persistent tail rubbing Find our 2026 deworming calendar here!