We have over 100 trees on our place and when ever we have a storm with high winds envolved I get nervous. Yes a tree can fall and easily take a portion of fence down but we have put an outside perimeter fence spaced about 80 feet away from our pens on all but one side and about 30 feet on that side. now the chance of one tree taking down both the pen and the perimeter is alot less likely. We still inspect after every storm to be sure. We are in the process of breaking the outside into areas that we can close of with gates should a tree fall. Why go to all the trouble? Our trees offer prtection from those scorching hot summer days,a wind break when those sub zero winds blow, and a variety of food for the deer with acorns and the leaves especially the maples. They gobble them up like candy. You might want to make sure you do not leave any choke cherry trees as I have been told that when a branch breaks and falls to the ground that the leaves contain prussic acid for several days after the branch dies. Prussic acid is poisnous and will kill a deer. We cut dozens of 30 foot cherries when we built our pens however most of them have sprouted and the deer readily eat the live leaves with no ill effect. Rick