I'VE GOT A QUESTION THAT I NEED HELP WITH. HOW DO YOU KEEP A DOG FROM WANDERING OFF YOUR PROPERTY OR SAY GETTING IN ROAD AND GETTING HIT. OTHER THAN KEEPING THEM IN A KENNEL. DOES ANYONE KNOW OF ANOTHER WAY. SHOCK COLLAR, ETC. I HEARD OF A COLLAR THAT YOU PUT ON YOUR DOG AND PUT SOME KIND OF POSTS UP AT THE END OF YOUR PROPERTY. IF THE DOG CROSSES THAT BOUNDARY IT SHOCKS HIM. ANYONE HEARD OF THIS OR HAVE ANY SUGGESTIONS?