In October of 2006 my farrier could not put shoes back on my horse because the walls of his hooves were so brittle. He told me to get a supplement with Biotin so I bought Biostride and had it fed to my 11 year old Spotted Saddle horse once per day. I was not at the barn again until this past weekend and I was simply amazed at the wonderful condition his hooves are in. His hooves are strong and smooth like I've never seen them before in his life. I have never been so pleasantly surprised by a product's effect.