The Bar Shoe
My new farrier, MArk Kelderman, decided to make Dumb a bar shoe, which will hopefully stabilise Dumb's pedal bone.  The seedy toe can not really be agressively treated until the pedal bone is stable
With the shoe correctly fitted and nailed on, Mark started to cut away parts of the wall, so that the seedy toe can be treated.  I had NO IDEA that the seedy toe in this hoof was so extensive!
Here's the shoe that Mark made.  It took him nearly an hour make the shoe, fitting and refitting it to make sure it fitted perfectly and supported the pedal bone.
Here's the cavity that the seedy toe has created.  Dumb has to have an iodine solution squirted up the hole three times a day.   So Dumb gets another farrier's visit next week, to make sure the shoe is still in it's correct position.  Then a week after that she has more xrays and a farrier's visit, to assess how the pedal bone is going, and to decide the future plan. 
What a big hole!  Mark cut out so much wall, but  he hasn't even cut out all of the seedy toe yet.  The infected area extends about 3/4" further on either side of the hole, and up to the coronet band.  Mark couldn't cut out any more as it would cause the pedal bone to rotate further.