To be honest, I've never used one. Don't think I would. I have seen them used responsibly a couple times though.Spoken like a true smallholder.
I used to fish a beat on the Tweed for salmon. The Ghillie had a dog that had the run of the area around his house along the one pool. About 3 or 4 acres. The access was off a reasonably busy road. The dog kept wandering onto the road. He set up a collar with a transmitter on the gate. Only took him a couple weeks to stop the dog wandering.



