cracked heel n.
See keratoderma plantare sulcatum.
About January 10 she was lame, and as she had a cracked heel, was treated by poulticing for a day, and then by antiseptic lotions.
Four Pound had a cracked heel last autumn, and I used to bandage him at nights.
Probably if you treated one of our horses in that fashion he would be likely to get a "cracked heel" and go lame.