Spin Doctor - 2016-09-12 1:29 PM What I have looked at the last 30 years of shoeing (mostly my own) is the same angle of the long and short pastern. Looking from about 5' from the side of the horse, hold up your rasp the same angle of the pasterns and using the rasp as a reference, make sure the hoof wall is parallel with the pastern bones. But this is just a reference. Most horses, this can be done, but on some, it just isn't that easy or needed/possible. To me, farriers get too carried away with changing a hoof to fit the "book". On some flat footed horses, this won't work........