What about wrapping the hoof with Vetwrap? Its not the most practical thing but you could put it only around the hoof without touching the skin!Pass it under the shoe a couple of times, so it won't come up, and then reinforce with metalic tape (you can buy it in hardware stores, its a tape thats stronger than the normal kind). Voilá!
Those look nice but my only concern would be him chewing them off. And could they be left on 24 hours a day. sadly he throws his shoe without bell boots and he needs the shoe
I don't know about 24/7. I never needed to leave them on all the time, just for turnout. Thankfully now he's barefoot and has beautiful, strong feet so I rarely put the bells on. Is your guy out all the time or does he spend time in a stall but needs the bells in there too to preserve the shoe?
I think for leaving them on 24/7, I'd get a few pairs. That way if they get muddy/dirty you can just swap them for a clean pair. I know that mud on the fleece is a *no-go* with my horse (he'll get a rub from the mud).
And as far a chewing them... my horse never actually got them off (but he did manage to open the *first* velcro occasionally but didn't get the second one open so the boots stayed on). I guess it all depends on how determined your horse will be in trying to get them off, or just playing with them.
I know how frustrating it is to need the protection of the bell boots and then have them put sores on sensitive skin! These worked well for me but as with everything, "your mileage may vary".