I put a fence around an apple tree that I wanted to keep for the deer. This tree was near my stand and the cows would congregate around the treefor hours eating all the apples. I just put up a cheap snow fence and it kept them out, out of sight out of mind I guess. The deer loved it they would come in hop over the fence and enjoy the apples all with 50 yards of my stand. Saw a lot of deer come to the fenced in apple tree.. Best of all the cows would go somewhere else.