It really will depend on your boys. Goats are really hard on fences. They will rub and climb on it for sure. My Nigerians would need a hot wire on the top as well as at their shoulder height so the don’t wreck the fence. If there are does nearby or on the other side of the fence the bucks will do everything and anything to get to them. Personally, I’d run the hot wire to be on the safe side. My boys can jump a 4 foot fence pretty easily if in rut to get to their girls .