Durvet FlyRID Ointment equine fly repellent – repels house, stable, face and horn flies from wounds and open sores on horses and dogs. Kills on contact, effective for hours. Contains 0.2% pyrethrins, 0.5% piperonyl butoxide and 1% di-n-propyl isocinchomeronate. Do not apply Fly Rid directly on cuts, wounds or irritated skin, or near eyes and mouth. Not for use on debilitated, medicated, aged, pregnant or nursing animals, or animals under 12 weeks old.