If you ride that much and him being around that many horses I would not worry about, I have a gelding that gets to be with a horse about one or two days a week other that that I ride him and he can see other horses when I am on his back if your with them enough they will want to be with you more then another horse. I don't see any thing worng with the hay ring, it's going to be safer with out thoese things they can get there leg in.
Kansas_twister I going to ask a dumb ? Was your hay ring for cows or horses? They make horse ones for horses so they don't get hurt.