Carr & Day & Martin Cornucrescine Daily Hoof Supplement. The Cornucrescine Daily Hoof Supplement is a premium specification supplement that helps to build and maintain strong and healthy hooves. The Daily Hoof Supplement delivers 20mg of biotin per day for the average 500kg horse. The Hoof Supplement offers a broad spectrum of quality ingredients at optimum levels to allow for increased levels of absorption and maximum benefit. The Cornucrescine Supplement is ideal for all hoof types including dry, brittle, soft and crombly hooves and is a palatable fornula that can be fed alone of added to an existing diet. For best results use as part of a complete hoof care regime. New hoof growth will be evident within 3 months but it can take up to 18 months for a full healthy hoof to grow.