You can use them like a heart-bar then un bolt to clean and doctor the bottom of the foot. You can also add or subtract to the frog support as needed with no trouble. I like to make my own but the Chapman Hospital Kit put out by Thror'Bred comes with all you will need. Shoe already tapped, bolts, alum pad, and frog supports are all in the kit, but still like the ones I make better. I have a client, whose horse founder due to hypothyroidism last year.
Horse needs daily meds.
No major problems after the first eight weekss of special shoes and meds.