re: electric fence or gps collar advice please

I've had 2 underground fence systems, first one was a Tractor Supply special and the little JRT would pin his ears back and charge through it. That one worked until lightening hit a big pine and it scattered the control box all over the garage. Insurance paid me for it and I called one of the companies to come install one. We turned it up a good bit and the JRT took off with his ears laid back, he got about half way across and decided it was too strong for him to stand and he turned back. He never escaped again after that.

Moral is pay a professional to do the job once and do it right.