This all-natural fly spray features an eco-safe formula that’s safe for the entire family and the environment. The ready to use, water-based formula repels and controls biting flies, mosquitoes, and gnats, leaves coat shiny, and features a fresh botanical scent. Backed by the power of geraniol and six fly-fighting natural oils renowned for their fly repellent qualities, you can use UltraShield® Green natural fly spray for horses on ponies, foals, and dogs.