Our Story John Ewing Company has been a trusted name in the equine supplement business since 1946. Learn more about us and Horse Logic Professional. Our Products Our trusted Horse Logic Professional products are scientifically formulated and proven to help horses. Purchase these affordable, palatable and easy-to-use products today! Testimonials Horse Logic Professional is trusted by professionals from all over the nation. Learn why so many people trust Horse Logic Professional in their barn. HORSE LOGIC'S SHOW SAFE PROMISE! Our show safe products are produced on OUR facility in Colorado, and free from prohibited substances. Look for products with our 'SHOW SAFE RIBBON"