I have a horse with a diagnosed “less than Grade 1” club hoof that has never been lame a day of his 26 years, even with bad trimming. This horse has been trail ridden on some rough trails through the years. Barefoot unless I wasn’t sure of the terrain.
The hoof does not need corrected, except to let it tell you what it needs. ”‹”‹”‹”‹”‹”‹. The toes wear themselves off on a clubby hoof. The heels grow at warp speed and need the most trimming.
My horse is trimmed every five weeks because the other, foundered, Horse has to be trimmed that frequent. Other wise the club hoof horse could go 6 weeks or a little more. His heels need trimmed down well ahead of his toes.
IMO, I would not have the last farrier you used return. If I remember correctly, this horse wasn’t lame until this last farrier trimmed him? I would worry about anyone who can sore a club hoof horse up that fast.
Also, FWIW, my clubby fella was also diagnosed with the opposite leg muscle being 1/2” (Half inch) longer than the muscle in the club hoof leg. That happened over the years. Even though he was in his early 20’s when that diagnosis was arrived at, he still has to think about picking the “longer” leg up.
A Grade One club hoof should not be that serious of a deal to trim, yet your horse is now lame, therefore I’d get a different farrier:)
Best wishes:)