It's not all 4 x 4. Up here in the pennines there are many places you can't use one for fox control, and then of course my favorite kind of fox work is the ambush across a valley, or moor, after days of ons, working out the best place to be for the shot, taking into account the route the fox will come in, the wind speed and direction, the back stop etc. I love the adrenaline when the grouse start growling or the curlew start going mad at the imminent approach of the vixen into your killing ground.
I love the fact the fox doesn't know the fear of its imminent death. It's just lights out.......