All my horses are barefoot sound. Daisy has softer feet than the others, but I just bring a hoofpick with me in case she steps on a rock, and we're good to go. I try not to do anything above a walk on asphault - minimal trotting as Spastic said. I watch out for the really chunky white rock/gravel type paths, as those can be painful, but asphault doesn't bother them. Thunder is pretty young, right? Young horses tend to have very hard, sound feet, and nothing seems to phase them. My 3 year old and two 4 year olds don't care about what's under their feet. It's my older mares, 14 and 16, that I pay more attention to. But all in all, they don't mind it, and asphault isn't terribly damaging to them. If you're really worried, a [pair] (apparently I had typed "mare" ha ha) of boots might be good to bring with you, just to give his soles a rest. :]
And on the notion of barefoot people... I ride barefoot myself all the time, ha. I love it. But maybe that's just me. ;]
ETA: Also, obviously, you'll want to watch out for pot holes, glass, trash, or small debris (screws, nails, that type of thing.) But I think that's a given. Lol.
Last edited by LeahKathleen; 03-31-2009 at 06:28 PM.