We did not have the system you are describing but did have invisible fencing at our previous home. It worked great for four years. One day our Westie saw a rabbit in a yard across the street and made the dash. After that day he he knew it only hurt for a second so the fence never stopped him again. As others have mentioned, it may keep your dog in but won't keep other critters out. It is helpful but NOT foolproof. You may PM me if you want further info.
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