Dry heals

Koi

Someone please help!

I’ve had issues for years with dry and cracking heals! I live in a very dry area and I can’t keep up with this. They get so bad that they bleed. I also rock climb all the time which makes them worse. I use pumice stones and aquaphor and it seems to work a little but not enough to heal them. Any one else have this problem? What did you do to heal it?