Firstly check feet for correct balance, get farrier out and give a good trim, shoe is wears shoes. Then if you have cracked heels apply neem oil, or flamazine or sudocream or manuka honey. Dry heels with a towel after hosing off, then rub on your choice of ointment, wipe off next day and restart your regime. Heels should heel brush when no longer sore and just dry skin. Heel balance is essential so they dont come back