We have used Gelatine to good effect. It is much cheaper and we have found
it works just as well as Biotine. 20g a day in the feed is all that we
used. There was an improvement in the hoof quality, and our Appies tail
grew a bit. It is a long term supplement, and the results are only seen
after two or three months.
Rob & Kathy ( and the Appie with a slightly longer tail )