the reason you don't get any arrows back when you shoot mudcrabs is the arrows bounce off and land somewhere around your feet. Also, you can go in the back door of Northwatch keep and rescue Thorald without all that bother. Just a couple of guards and the interrogator. And in other news, I know horses are a waste of money in Skyrim and I myself have called spending $1000 a "stupid tax". But my first and only horse, which I got at about level 12, the paint you get in Markarth, just died at level 68. It wasn't even her fault! She died as a result of hard landing on fast travel. That made me so sad.