EcoSmart Natural Horse Fly Repellent for horses keeping them free from flies and other flying pests. It ready-to-use and is made from plant-based essentials oils and other inactive ingredients. Use the 24 oz. pump spray bottle to apply directly to the body of a horse. This process should be repeated as needed. Safe to use around children and pets (when used as directed). It won't harm fish, wildlife or contaminate ground water supplies. EcoSmart has been creating safe, effective ways to eliminate pests and weeds for almost 2 decades. With our proprietary formula of plant-based essential oils, we are protecting you, your family, your pets and the ecosystem from harmful chemicals and disease spreading pests. You can feel safe using EcoSmart products in and around your house.