Tonight some of the younger sheep were able to push the bottom of one of the hog panels away from the fence post just far enough to wiggle through. Once the first ones showed the way, they all followed. (They are sheep after all!!) They got into our new hay and in with the horses before we realized they were out. Luckily they are easily tempted with a can of grain and we had them back in the pasture in no time. We will need to walk the fences to make sure there are not any other places where they can make a run for it!