Ian McKinlay demonstrates the quarter crack repair technique his father developed back in the mid sixties. This video clip shows the importance of proper heel support and the need for the crack to be stablized for better healing.
Some horses are born with very thin walls which do not allow them to be shod comfortably with nails in their natural hoof. This video will show how hoof walls can be thickened artificially. This horse raced very successfully in New York and New Jersey. He was fitted with a nail on version of the Yasha shoe. There is no voice added as of yet to explain the procedure. The drill being used is a 1/4 inch in size. That will give you an idea how thin his walls are.
This video shows how flexible the hoof capsule is when it is allowed to be. What are the consequences when the hoof is restricted by a shoe? Many studies are being researched on that very question.