No bashing here.

We had two Airedales growing up. We had a fenced in yard, but Tinker's Terror was ALWAYS getting out. We put up a fence and he always managed to get out. My Dad put up an electric fence. He only turned it on ONCE. Just enough for Tinker to get the idea that everytime he tried to get out, he'd get zapped. Tinker did get zapped once and that's all it took. My Dad turned the fence off and never used it again.

That's may be all it'll take. I don't like those "invisible" fencing things, as your dog could be a target for other animals that don't have the electronic collar.

Good luck. Let us know how you make out!