DE works best to keep bugs out of feed... most feeds have it mixed in. I had ants in the chicken run after the water and sprinkled a circle of DE around the waterers. Ants stopped coming. Borax will take a little longer to work, but it's not so toxic and kills the whole colony, so you don't have them popping up in a few weeks after they find a new way in. My ant problem was gone in 2 days, and they never came back. Borax doesn't stink either, so that's better for me.Well, it is supposed to work by scraping the exoskeletons of bugs and they dehydrate. So it would take a while. Same as borax. Not going to kill like RAID.