We don't have many trees in these parts, but I have not heard of lightning protection for trees. Maybe there is such a thing, I don't know. Several years ago we lost several cows and calves in an early spring thunder storm. We were feeding the cows using an electric wire, and lightning hit the fence and killed 9 cows and 5 calves that happened to be near the wire. Of course, none of the calves belonged to the cows that were killed. Another cattleman not far from here, lost over 40 head in a thunderstorm a few years ago. His cows lined up against a barb wire fence in the shade of some trees, and lightning hit the fence. Every animal standing near it was killed.