I LOVE this 3:1 zinc and copper supplement and it is affordable enough to give to my entire barn! My horses were struggling with chipped hooves and bleached out coats and I can already see them start to really darken up in the short time I've had them on it! Our pastures are high in iron but I always blamed their bleached coats on the sun. One of our horses was on a (much more expensive) supplement for his hooves and I noticed he was the only one in the herd no bleaching out. I looked at the ingredients and sure enough there was added copper and zinc in the 3:1 ratio as the main ingredient! I immediately switched him to this and he is doing fabulous on it along with all of my other horses. And I am saving money! Thank you so much for a great product, I have already recommended it to so man...