All Natural Herbs for Calcium Deposits in Horses Is your horse suffering from excessive calcium deposits? A poor diet can be the cause. Silver Lining Herbs has developed a number of products to help reduce calcium build up in horses. Our specially formulated herbs are designed to reduce excessive bone growth, bone spurs and even improve hoof growth in your horse/s. Our alternative to supplements are herbal combinations that carry with them the NASC Quality Seal. A large number of professional riders and reputable equine veterinarians recommend our products, soon – you will too.