i have heard of this method and has worked with others ..........the way a done it was when she was 6months get my jacket put it over the fence so it cnt see through the fence but also covers the barb wire the dogs usualy climbs up and pushes off to start with and after a few days satrted jumping over the jacket now its jumping fences pretty easily most regular sized fences ......... but people have their own ways ....... GOOD LUCK
HAPPY HUNTING