High heeled conformation flaw - in a five year old half-Arabian, half-Quarter Horse mare. This was not a congenital defect, as the mare developed this as a weanling during dry conditions when her hooves were not kept in proper trim.
<a href="//commons.wikimedia.org/wiki/User:Ealdgyth" title="User:Ealdgyth">Ealdgyth</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>