FYI. You can and I have seen arrows penatrate the shield of very large hogs. Key ingrediants; High poundage bow, heavy arrow and very very sharp broadheads. I hog hunted in Perry Florida a couple of weeks ago and a couple of the other hunters where using expandables. They were warned but it feel on deaf ears. The expandables one guy used just bounced off the hog. The other guys did penatrate but not a clean kill. Used the dogs to help track it but do to high water, we did not find it. We did find it the following week. What a waste. Shots on hogs should be focused farther back, avoiding the shield.