Check the listing for details. Equerry's Combined RX 4-Way Supplement - 5 lb. Condition: New. Listed at 94.99 USD. Combined RX, by Equerry's provides outstanding comprehensive nutrition with the performance horse or senior horse in mind. Probiotics, yeast, and digestive enzymes improve digestive health; Hyaluronic Acid, Glucosamine, MSM, and Chondroitin support healthy joints; Biotin, Omega 3s, and Amino Acids support healthy hooves and coat; and Vitamins, Minerals, Organic Selenium and Kelp Meal increase your horse's overall health and well being. With all four of these areas targeted, Combined RX provides an all-in-one nutritional support for your horse at a great price! Supports digestive health, joints, coat, hooves, and overall health & wellness. Made in USA. 5 lb bag provides 40 daily servings for a 1,000 lb horse. By Equerry's. Fast shipping on Combined RX and all your equine supplements at Mary's Tack & Feed.