Stallions aren’t just crazy dangerous hoofbeasts. Some have temperment problems because they are treated as dangerous and kept solitary from other horses (which actually causes the behavioral problems). I don’t know this horse so I don’t know if he’s actually gelded but judging by his thick neck he definitely could be intact. The point is, stallions can be (and usually are) just as gentle as geldings. Personally I actually wouldn’t take ANY full sized horse into a hospital or other indoor/cramped area O.o they are incredibly stupid and wholly unaware of thier bodies most of the time.