I watched one the other day (the dog was marking the living daylights out of this one lol) through a gap in rocks actually squeezing his way into a safer part of the "earth" definatley would have been a big ask for a small terrier to follow him!
I've trained a dog to come back with a beep on an electric collar- certainly came in handy a few times before GPS- but i wouldn't think it would stop your dog from hunting good scent. Sounds a handy lurcher if only you wanted it to hunt lol.
Nothing wrong at any time of year with foxes genuinely being controlled where it needs to be done- the maddening thing is the amount that only get out this time of year when its fairly easy to come across vixens and cubs to ground.
Horrible feeling when that roof ladder slips an inch or two!! For a few seconds you just don't know if it's going to stop.I keep a hammer ready... emergency brake! lol
The vibrate-whistle can be seriously handy for recall. Shock collars can be cruel in the wrong hands but how many dog haven't had to be PTS because the collars sorted out their bad had habits?
https://youtu.be/1k23WIDGyd0
This trail cam was fixed to a solid post WR it did a good job of spotting lots of creatures , including a lager drinking poacher one day lol