I have never been a fan of equine supplements as I have never seen any real results from using them...UNTIL I tried (at the strong recommendation of a great friend) ImmuBiome Breathe. I have to say I am astonished! IT WORKS!!! In three weeks of adding ImmuBiome Breathe to his feed, he is no longer coughing! I am seriously amazed! He doesn’t even cough once or twice during exercise. I am so grateful for this product. I can’t imagine how great my horse must feel! I don’t know how this product can do a better job than a prescribed medication from a vet, but It certainly has worked for my horse’s issue. THANK YOU ImmuBiome! My horse and I are true fans!