Wild hogs are tough, and knowing where to aim is important to success. Hogs have a just reputation for being tough. Many mature hogs, especially boars, have a gristle-like "shield" or shoulder plate that can completely stop a broad head hunting arrow. The shield on a big hog can be 1-inch thick and can completely cover the rib cage. I once shot a 150-pound hog at 10 yards with a 70-pound compound bow. The razor-sharp, broad head-tipped arrow hit perfectly low and behind the shoulder and knocked the hog down. But the arrow didn't penetrate its shield. We tracked...