Hey, Stevie, lots of exclamation marks are what make a post seem 'heated'
Being organic and type of fencing have nothing to do with each other as far as I can remember, though someone else may know more about that as I haven't read the rules in quite some time. A scratch doesn't hurt that much compared to the (low level) electric shocks from the wire we use.
Id' rather use fixed fencing with a strand of barbed wire along the bottom, actually, like HappyHippy and Manian do. But as it's not our field we don't have much say in it.
When the piglets get out, which they inevitably do when not yet trained or the electricity is off for whatever reason, they can get far very quickly indeed. When the wire was still part of the loop that runs around many fields and is on the mains, it malfunctioned every now and then (nothing to do with us), and once several piglets were very nearly on the road. Took 10 years off my life, that did, hence why I'd rather that the little ones are behind something they can't slip through. For us, that would work better given the location and lack of further fencing around the farm. The larger ones never went far when the electricity was accidentally off, they knew very well where they were supposed to be.
But when installing pens or moving pens around, no doubt electricity is an awful lot easier.
It's the white half inch wide tape that's around our pens, now charged with a car battery rather than on the loop that serves all those other fields. It never sags, and we have the usual lower strands to keep the pigs in, and a higher one to keep the marauding sheep out
with a short strand a bit lower as our 'step-over gate'.
Get a big roll of tape and as many white sticks you can find, Dave, you'll use them over time