barb wire is totaly out of the ? hahah you should get some red top fence or better yet Hog panel and do it up my dad has 5 strand of barbed wire and they still go threw it, corse he really doesnt mind much NEmore =). I have seen them force there way threw the red top fence after a while but it will work. I also feed year round the problem is if its not hog/cattle panel (piglets will still go threw the cattle panel) they will force threw cause htey smell the food =). Hogs are very smart animals.