Lately I've noticed Sonny's hooves hitting each other occasionally. He usually doesn't do it, but if he's upset at me he does

...and I don't want him to hurt himself.
There was some type of boots I saw....bell boots I think they were, but they were plastic, and you had to roll them on the hoof, and they looked like it would be a pain in the butt to get on and off each time I ride.
What else, besides those plastic boot things is available, that works great, but is easy to get on and off?