Since 1946, Happy Jack has manufactured high quality, effective animal health products for dogs, cats and horses. As a result of their commitment to safe and effective animal health care over the last 60 years, Happy Jack has developed strong brand recognition and customer loyalty, and we are proud to be an exclusive online retailer of their entire product line. Happy Jack products are approved and regulated by the FDA, EPA and State Departments of Agriculture and sold over-the-counter throughout the United States.