Go slowly. Her feet did not get like this over night. Removing to much at a time will cause soreness and start another set of problems.
How does she walk? Does she favor any leg? When you are messing with her hoofs does she have any sore spots? Are her hoof warm or hot to the touch?
How does she walk? Does she favor any leg? When you are messing with her hoofs does she have any sore spots? Are her hoof warm or hot to the touch?