There are alot of guys on here with way more hog experience than me , but here goes. I did track two hogs in Tex. that left Very little blood. One of them left No blood for aprox. 25-30 yards, then three drodlets, then a dead hog. It was almost as if the fat or cartilege from the shield closed around the entrence hole (30-06 did Not exit). I've deer hunted for years with theses guys so when they said "I know it was a good shot!" I knew to believe them. Don't just look for blood, look for tracks, tore up or turned over leaves, broken brush,ect, depending on the territory. Get on your hands and knees and look. Many times by getting down on a critters level, you can just tell where they went or would go. If all else fails, go to the last place you so him. Use that spot as a center point and walk a complete circle aroun it say ten yards away. Keep walking ever bigger circles until you find it. Good luck! :-)