FEDERALLY APPROVED OTC TREATMENT FOR MANGE. Through rigorous testing requirements and application, our formula has been federally approved and registered to be safe and effective to treat sarcoptic mange. | THE ORIGINAL! SINCE 1946. The founder of Happy Jack created this original solution for his beagles infected with mange. Standing the test of time for more than 70 years, Happy Jack remains the number 1 selling over-the-counter treatment for mange. | SOOTHES IRRITATED SKIN. Effectively relieves itching from severe mange, fungi, falling hair, itching eczema, allergies, hot spots, moist feet and ears, and pus pimples. | FAST-ACTING FORMULA ON STUBBORN CASES. Works within just a few days! Happy Jack relieves the most stubborn skin irritations when other products fail. | RESULTS IN 3-7 DAYS. Shake well and apply directly to your dog or horse’s affected area.