NATURAL FLY REPELLENT is a water-based formula using a unique combination of citronella and other botanicals without the use of harsh chemicals. The result is a fragrant, gentle, non-oily spray or wipe-on for dogs, cats, and horses and is gentle enough to use daily. Repels biting insects including mosquitoes, yellow flies, black flies, no-see-ums, gnats, chiggers, ticks and deer flies.