My 3 year old OTTB filly is barefoot. Her shoes were pulled as soon as she came off the track, and I picked her up about two weeks later and just kept the shoes off as she wasn’t terribly sore. I used Keratex on the soles of the feet and over the hoof wall to harden them up over the course of about a month and then switched to Hooflex dressing when her feet hardened up but got too dry. She isn’t on a hoof supplement and does just fine now, but bear in mind that she had pretty decent feet to begin with (not crumbly or soft). The only supplement she’s currently on is SmartOmega3.