I mentioned as much in the initial report, but at your request I booted up once again with no mods, with the same result. Dongs everywhere. All horses, new and old, all have dongs. No geldings, no mares. It’s incredibly distracting. I even did single-player vanilla and got the same result. It’s clearly a base-game/client-side issue, and as you can see above, I’m hardly the only player who has it.