by Bill Edmonds A few years back my wife noticed a persistent beeping noise coming from the garage.  Upon further investigation she realized that it was originating from the control panel of Buddy's invisible fence.  Buddy was our family pet at the time, a high-energy yellow lab.  The beep is a warning signal that is transmitted whenever the electronic fence has been compromised.  When the boundary was broken, Buddy's shock collar no longer worked, and he had the ability to escape the confines of his half-acre playground, without a sharp pain to his neck. But here's the interesting part.  Buddy…