Smartie had a partial hoofwall resection because he has white line disease. White line disease destroys the inner hoofwall called the stratum medium leaving a cavity under the outer hoofwall. The micro-organisms that cause white line disease are anaerobic, so exposing the infected area to air is an effective treatment. A heartbar shoe was applied to distribute the load of the missing wall to the frog, allowing Smartie to remain sound while he grows a healthy hoofwall
Heartbar to distribute load
Inside Right Hind Leg