We rely on Murphy's equine intelligence to guard our pastured animals. He prefers the Belties to the Katahdins and goats but his bray deters any aggressor's approach. With perserverence, he discovered that he could put his head between the bars of the field gate and lift it off its hinges, alllowing him to micro-manage his little kingdom.
Four well place scews, two in each hinge, hold the hinges in place and have stymied Murphy's field management efforts.