Here are some things I would recommend.
Feed this supplement
--> Biotin Crumbles
And use any of these conditioners/dressings
--> Hooflex Conditioner
--> Fiebings Hoof Dressing
(this one has a pretty fowl smell)
--> Rain Maker
--> Mane 'n Tail Hoofmaker
I have used all listed in the past and present and could not have asked for better results.
Also, in reference to the shoes being an issue....I do not know where you got that info from but it totally bogus.....applying a hoof conditioner or dressing should have no effect at all on the shoes.