I myself do not have it ,but my boss does for his three dogs,they are all good size dogs.Well I house sit for him in the summer. He showed me how it works when he lets the dogs outside.One of his dogs got to close to the restricted area, when I ever saw that poor dogs jump up an squirm like a worm and with a scream I will never forget I WAS ABOUT TO CRY ...I told him that I will not let them out without their leash because I never want to see or hear that again.......
not for me....after they train for a while I'm sure they will get the hang of it,but not in front of me ...
