I've read some of Pete Ramey lately and have decided to blend my farrier's advice of keeping Buttercup booted with Mr. Ramey's advice to boot and use frog pads to help hooves condition.
Right now, Buttercup is on as much turnout as possible in her Rx EasyBoots with a big green frog pad. When (or if) she comes into her stall, her boots are removed and she is bare in her stall. If I hand walk her, I put her in her used Epic boots with a thick foam pad.
The idea is to stimulate the frog and increase bloodflow to the hoof. We also want to keep her hooves dry and the barn right now is flooded, and likely will be through winter. She has the driest hooves in the barn.
Here's a pic of her Rx boots with frog pads:
Here's what it does to her hooves: (squished, atrophied frog)