Be wary of approaching any hog that appears to be dead. Over the past ten years I have seen several apparently dead hogs suddenly come to life and go after hunters, including myself.
Sometimes when a hog is wounded it will just lie there. Eventually it will die unless it hears a human voice or someone approaches the animal. A friend got a lot of stitches last month when a wounded sow jumped up and nailed him. For going into thickets after wounded hogs I wear chainsaw pants: No hog will get through that kevlar.