I am here in Massachusetts, the Boston area, and I cannot find food grade DE anywhere! Anyone have any ideas where I can find this? I was told to go to a pool supply store and my husband did and picked up a huge bag. I am really glad I looked closely because it has silica in it and has cautions to "not breathe it in"! Glad I looked!!! I asked at Agway and the guy said he didn't know what I was talking about, he just used regular mulch for his chickens dirt bath and they were fine. I'm just at a loss.......