i have had gos ( wonderful pigs) and now gos x berkshires ( lovely also and nearly ready to go). I have ended up with just a single strand of stripey cord run off a decent mains zapper. They don't go near it, but can tell when it's off due to the noise from the unit. Luckily i also have livestock fencing as well. this weekend was a strange one. wild and windy overnight, which spooked everything. i had a squirrel in the sheds looking for food, which when I chased it off set off a chain of events. it knoked over some timber, which flipped up a length of banister I was saving, this knocked the fencing power unit off its mountings and must have stretched the wire further along. the connection came away, but I did not notice. that night something spooked next doors sheep and all 130 of them stampeded through the gate and up our track, round and round the garden,. another neighbour returned from celebrating a 50th and saw all this happening. The chap had had a few and went to bed, the lady was left trying to raise people to help, but could not be heard anove the noise of sheep and the wind.sunday morning left me wondering where all the footprints and poo had come from. who had eaten all my broccolli?The farmer denied all knowledge, his sheep were back in the field and the poo was too small? my neighbours were still asleep, both sides. my chickens were all fine and the one who was missing the day before was waiting to be let back into the run. The pigs had noticed the lack of zap ( eventually) and were bulldozing round the perimeter. They did not quite escape but were close. Pigs are strong, intelligent and adventurous, maximum security required.