I've read so many posts saying that their local feed stores don't know what DE is or even carry it. I went to mine today to get another 100# layer and askied "Do you carry DE?" And they responded, "Why yes we do! Let me look it up for you." They had 40# food grade bags for 15 bucks! Didn't get one though because that's a lot of DE... and I still have a whole can of poultry dust. Didn't seem like a bad price there.