Water based, alcohol-free, natural formula repels and kills horn, stable, house, horse and deer flies, mosquitoes, gnats and lice on horses and ponies. Also kills fleas and ticks on dogs and cats. Equi sect Fly Repellent contains botanical repellent Pyganic (0.10% pyrethrins), organically derived from chrysanthemum flowers and the first pyrethrum listed by the OMRI for use in organic farming. Also contains natural oils of citronella, clove stem, thyme and corn mint. Non irritating; gentle to skin and coat. Leaves a fresh, herbal scent. Gallon size features ergonomic handle design for comfort, convenience and ease of use, and a spill-proof, Easy Pour Spout. No funnel required simply refill quart as needed.