Formula4feet available from www.equi-life.co.uk is really good.

Biotin and magnesium are good for hoof growth, and I think someone once told me that rosehip tip was good for them. You could try putting hoof oil on everyday or something like keratex hoof mosturiser

Hi, I use NAF Pro feet liquid supplement in my boy's feed and the Pro feet hoof moist to massage into his coronet bands. Within 3 months his feet have improved dramatically. Apparently the massaging of the coronet bands helps increase their circulation, thus improving growth, equally if you can get your hands on a Equissage machine this will have the same effect.