wall separation at white line caused or aggravated by nails and unnatural mechanical leverage
wall, white line, and sole showing damage and discoloration around nail holes
hoof wall integrity compromised by nails and rasp
lack of normal wear resulting in overgrown wall and damaging mechanical forces
pathologically high heels
link to more interesting photos:
http://picasaweb.google.com/HCBiovision/EquineHoof#