I am riding in the homecoming parade in two days and my horse is barefoot.
In winter when there is snow and ice, I have groundworked with my horse and seen him walk all over ice. He may walk a little slower than usual, but let him because even if he does slip it shouldn't be too bad. I got on my horse bareback with no lead in his small pasture and he walked right over a long sheet of ice. His feet slipped a little here and there, but his bare feet and wlaking was still pretty good and he kept his footing.
I don't think it will be an issue, but I do suggest not going above a trot at least. Me, I wouldn't trot, but if it isn't too icy then it shouldn't be a problem. I don't think it will hurt him, but if you trot for too long at a time he can jar his legs, and it may cause a bit of pain but it not too much.
I don't think his hooves will crack either, but it also depends on how his feet are over all. Some horses feet crack on grass and horses like mine will never crack a hoof.
🔫 Don't Tread On Me 🐍