Her Fence? Your Fence? I had the same problem a few years back. Different rules in different states, however, in my situation. The requirement is for the "farmer" to fence the cows out of his cultivated crop, not the "Rancher" to fence/keep the cows on his/her side of the fence.So I maintain the fence and the section that they seem to like to pass through the mostI electrify from time to time. No problem now. As the saying goes a good fence makes good neighbors.