In Massachusetts, a fox attempted to attack several people, including a police officer in his cruiser. It tried to climb a ladder to get at a man on a roof. In its most dramatic feat of incompetence, the fox failed to injure a little girl when her dogs roundly thrashed it.
Dogs guard girl when fox attacks
As often mentioned here, rabies is the likely cause when foxes attack--especially when they attack animals far too large to serve as prey.