we had our large blacks on one strand which worked well with them being lop eared - about a foot off the ground. Your 10 week olds will need alot more wire, closer to the ground - pigs tend to go under rather than jump. We set ours up on four strands, 2 on whatever were the lowest hooks on the plastic posts we used, then missed one then the next two. You need to watch out that the growers don't earth up too much along the bottom wire.