Curicyn’s BodyGuard Fly, Flea, Tick & Insect Repellent Horse Supplement is sure to be at the top of your list to keep pesky pests away from your herd. This natural, botanical, oil-based formula is easy to use and 100% non-toxic to humans and other animal species. Because the special formula works in its vapor form via the olfactory receptors—including the antennae and feet of insect pests—it doesn’t need to have contact with the insect to be effective. This means less product is needed on and around your horses!