I was excited to try this and got my tub as soon as it was released. My horse is diagnosed with allergic rhinitis. He was having 50-70 preds a day, along with a nose net to be semi-rideable. This product has COMPLETELY alleviated any head shaking due to his allergies. Please note, he is not a head shaker, he head shakes due to allergies and his respiratory tract overreacting to anything in the air when his breathing gets heavier, ie. Trotting. He hasn’t had one pred since starting this stuff. I add 2 scoops into his evening feed every day. His head has never been so still!!!