I'm a skeptic. Especially when it comes to supplements for the horses. In my 40 years of owning, riding/driving and showing I've seen a lot of fads come and go, including many that didn't work. In late summer (August) we noticed that the boys had inflamed guttural pouches, were coughing and had thick, white mucus in their nostrils after work. Our vet prescribed a course of anti-histamines and things improved, but as soon as we'd back off the antihistamine, the symptoms would reappear. There had to be a better way to treat than continuing to treat with antihistamines for weeks on end - but what? We follow Dr. Kellon's work so I was surprised when I saw the studies about supplementing with Spirulina - OK, so we've got some science to back this up. We've been off the antihistamines for 6 we...