Don't they have any kind of insurance on the farm that would cover something like that? Maybe next time they would move the cows inside to avoid something like that. My dad was a farmer and the cows were never put outside during a thunderstorm. There also no trees in the pasture either to get struck by lightning. If the cows should happen to be outside when a storm approached, they had another smaller shed lihe barn that was open on 2 sides that they could go to for shelter. To avoid this happening again, cut down any other trees that are in the pasture.