Bug off natural defense* flea, tick & pest defense* for dogs, cats & horses* (* as recommended by holistic veterinarians for use under a traditional medical system) Bug off natural defense* flea, tick & pest defense* for dogs, cats & horses* may help act as a natural insect repellent and plant-based insecticide for fleas, ticks, mosquitoes, flies and bugs; may help function as a natural insecticide and natural anti-parasitic by creating a ph balance in the blood and scent that may help repel fleas, ticks, flies and other parasites, while its adaptogen content may help modulate (upregulate or downregulate) your pet's immune system, as needed.