I'm in West Texas. I've been finding the ground on my hunting place grubbed up in lots of places. It looks like hog to me, but why are they not touching the corn at my feeder or the mineral block that's not 60 yards from this grub? Plenty of deer, turkey, coons, rabbits, dove and quail at the feeder via the trail cam... but no hogs. I've got a mineral block out too. What gives?