your dog was caught in a fox wire , set on a kill pole , although the snare was free running , the fox wraps itself around the pole and expires quite quickly, your dog could have done the same if you hadn,t been with it , although some dogs have the sense to sit down and wait , this method is used i north america to kill snared coyotes .
Thanks snareman, a good thing I was there I only though rabbit snare as it's an arable farm. I don't think the dog was planning on sitting & waiting. Would the dead hare in the field be a lure, or just coincidental? (I had also found a couple of shott