All Natural Herbs for a Mares Hormone Balance People aren’t the only animals who can become hormonal and moody. Your mare could have a hormone imbalance which needs regulating. There are many methods you could try to correct this imbalance, but there is an all-natural herbal alternative you can try to keep these hormones in check. Silver Lining Herbs supplements carry the NASC Quality Seal and are trusted by equine veterinarians and horse lovers all over the country. Designed to improve horse health in a natural way, this is one alternative to regulate hormone issues with your horse. Many professionals recommend Silver Lining Herbs, and you may too once you try our supplements.