BugLyte insect repellant is a gentle alternative to the harshness and sensitivity problems of many of the spray-ons. Gentle powder supplement offers a three part strategy to keep horses pest-free. Garlic and thiamine ward off flies and mosquitoes on the outside while De-Odorase© lessens manure odor and pest attraction. Also helps digestion by balancing pH levels in digestive tract and aids gastrointestinal health. Non-toxic insect deterrent does not contain dangerous chemicals or insecticides.