Another thing to perhaps consider is getting some x-rays so you can see the full picture of what’s going on with this guy’s feet.
My mare has Foot Problems™ :lol: - A combo of not-great raw material to work with (shallow sole, thin wall), internal issues (minor issues with navicular bone), and farrier work that was not working well for her feet.
With X-rays, we were able to see exactly what was going on internally. I tried to work with my existing farrier on the issues but it wasn’t the right fit - so switched to someone new, got things sorted out. Even after the first trim, she was better, and now 8 months after starting down this road she is working super well, sound, and happy.
Having my farrier there with the vet while taking x-rays was the best possible thing we could have done. They were able to brainstorm different solutions and work together to get her in better shape.
Absent that - a better farrier and much shorter trim cycle is the place to start. 8 weeks is really quite long for most horses. It may seem like his feet “grow slow” but usually that means the heel is growing forward, running under, and the toe is creeping out all the while the angles are getting worse and worse. Not a recipe for a happy horse.
Good luck with your farrier search! Mine was no fun, but it was worth it in the end 