Unless it was thousands of acres for elk, a high fence would not be close to a fair chase. I've watched elk out in Wyoming go a couple miles before slowing down after a gunshot or even when jumped from upwind by guys. In fact, I was up high glassing one day and heard a rifle shot up on a ranch a mile or two to the ne. In about a minute a big herd with close to 100 animals came over the far ridge and I watched them continue on a trot up and down over 4 or 5 finger ridges that went down into a big canyon. They were still going several minutes later and went at least 4 miles in that time period before they went out of sight. That's why I've said that it depends on what animal it is and what cover is involved to hunt a high fence place.