the supplement I started giving her months ago have increased her hoof growth considerably but I learned today that alot of hoof supplements will increase growth rate but not improve thequality of what it grows out. So, I am discontinueing the supplement.
Yeah, if you only started it a few months ago, normal response to nutrition won't make much of a noticable difference for a fair few months - studies done on biotin say 6-9 months I think. You're correct that some nutrients - namely biotin will make hooves grow a bit quicker, but I don't know of any nutrient that causes 'fast forward' growth to anything like that extreme.
While every supplement on the market claims to be necessary & some sound like 'miracles'... or 'snake oils'
, from my analysis of many(not just hoof specific supps), they are often far from what they claim. *However as domestic horse's diets are almost invariably deficient/imbalanced in a range of essential nutrients, I do think that *appropriate* supplementation to provide well balanced nutrition is important.
Here is an online article giving some more info on nutrition as it relates to hooves. Caring for horse hoof
Oh and Holly, while your treatment may have made a positive difference, don't discount other factors, namely a good farrier, good management & environment & healthy diet.... & time