Farnam Flys-Off Fly Repellent Ointment is a safe and effective fly repellent for horses, ponies, and dogs containing 0.2% pyrethrin It protects wounds, open sores, and scratches from disease-carrying flies, repels house, stable, face, and horn flies, and kills flies on contact The ointment is ideal for use on ears and facial areas and provides hours of protection but should not be used on animals under 12 weeks of age