Hey I did find a website for concrete barns, do you want it? I dont know if there are round barns though
I don't think a horse would try to go over that unless he was freaked out so much that he just tried to go over it blindly.
No, most horses wouldn't try to go over that. I like the design, it's made so you can flip up the piece to entirely close off the top - that's good for horses that nip or stallions, or sick horses.