I can speak from experience on this one.The only thing thats gonna keep hogs out is killin em or trappin em and even then you probably aint gonna get em all.Just get out there and hunt and kill every one you can and you will probably have to hunt them a lot at night to really thin them out good.A lot of times you kill a few and they realize they are being hunted they will move on for a while.A hog or two here or there I do not mind but when a whole herd moves in on your property like they did on mine will destroy a food plot for deer QUICK!Just put the huntin pressure on them and they will move on at least they did for me.Good luck!