You can get Biotin (powdered) and add it to their normal feed, my fussy boy was OK with the taste and hes very choosy. Much cheaper!
Or try Dengie healthy hooves as a complete food, lovely stuff with nuts and chaff and mint and biotin (NOT spillers happy hoof thats like sawdust, the dengie one is lovely and moist and is lami approved too). I used to feed farriers formula to my barefoot girlie but then switched to just feeding HHooves and shes been just as good and MUCH cheaper!
I have started to feed him biotin.
I must say I agree with you haffieliesel he was being fed the spillers HH when I bought him and I do prefer the Dengie one (fed it my old boy because of the nuts and mint he didn't need it for his feet)!
Top Spec Anti Lam. The differnce in my lad's feet is unbelievable & goodness knows I've tried enough supplements over the years. I believe that Top Spec Comprehensive contains the same hoof supplement if you don't want weight loss.