I find that barb wire wont stop cattle putting their heads through and pushing on the fence. Once they learn to do that the fence starts to lean and the wires sag. I've seen lots of good fence ruined by cattle thinking its greener over there and putting their heads through and pushing. I have to replace this fence because the cattle on the place before I bought it pushed the fence down (netting and barb). My cattle are trained to electric fence and I guarantee they wont push on the new fence.

I find that a fence properly designed to be electric will have very few problems. The non electric wires in this fence act as the earth return back to the fence unit, so grounding wont be a problem. The plain wires can't wrap together and nothing will lean on the fence to push it over. All my electric fence problems come from old fences that have hot wires added, or fences with barb and a hot wire close together (kangaroos just love to short those).