There are times when sealing/lacing/casting a crack may be appropriate but in this case, I'd say no.I will definitely ask him about getting the toe more relief. He said next time he is out he wants to seal the crack to give it a chance to grow out. Thoughts on doing that?
Address the distortion in the foot and the cracks will eventually grow out (particularly the horizontal "crack") or, in the case of the vertical crack, it will grow out or simply tighten. Using adhesive or any polymer to "seal" the vertical crack is likely to trap anaerobic bacteria.
Definitely clubbed.Based on my pictures, you would definitely say its clubbed not foundered, correct?
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As to potential for founder (laminitis), probably none active although there may be history of mechanical rotation. Radiographs are always a good idea, if for no other reason, to determine extent of any bone remodeling, sole thickness and to set a baseline for future reference.