Last summer my horse was coughing when I was warming him up to run. I thought he may have been having an allergy reaction to what he was eating. I had him tested and he tested to be allergic to just about everything I was feeding him. My first thought was…. what am I going to feed this horse???? I decided not to have the medication made up for him and I started him on the Allergy and Sinus Blend by Deanna Harrison. He has been on Allergy and Sinus blend since last summer. No more coughing!!! He gets 10 drops once a day in grain. Love Love this product!!