All Natural Herbs to Improve Digestion in Horses Is your horse or equine suffering from digestion problems? Symptoms such as a poor or inconsistent appetite, cribbing, abnormal gut sounds and soft manure are signs that your equine could have an issue. Silver Lining Herbs has developed specially formulated digestion herbs for Horses that are both all natural and 100% organic supplements designed to improve digestion in your horse. As a brand “Silver Lining Herbs” has received the NASC Quality Seal. Additionally, a number of professional riders and reputable equine veterinarians recommend our products.