Similar situation with our goat, we put Iodine on the wound and it eventually scabbed over and healed. If she will come for food you might can lure her in with a bit of food and pour a small container of Iodine on the horn area. Good luck!
We keep nylon dog harnesses on all of our goats. This gives us an extra "handle" on the goat. We have never had problems with getting stuck on anything, but have had a small issue with a few goats ganging up on a smaller, younger fainting goat and occasionally getting their horns under the...