All Natural Herbs for Bronchitis in Horses Does your horse have swollen bronchials? Bronchitis symptoms in horses range from coughing, sore muscules, trouble eating and throat irritation. If your horse has these symptoms you need to try Silver Lining Herbs specially formulated herbals for bronchitis in horses. Our alternative supplements for horses come highly recommended by some of the world most reputable equine veterinarians. Did you know? Silver Lining Herbs proudly holds a NASC Quality Seal. The Quality Seal means that our products have been independently audited for compliance with specific standards of quality in manufacturing. You can always count on Silver Lining Herbs for Quality.