I’m gonna throw something out that hasn’t been mentioned yet. Don’t misunderstand me, I’m not discounting any of the other reasons people have mentioned, but one that hasn’t been mentioned is weather. All other things being equal, I see more foot damage in the sloppy muddy weather than I do when it’s dry. That leads me to believe the foot is sliding more in the trap and causing the damage. If they were on a drag, they probably would have picked a drier place to lay up lol.
Matt