What exactly is DE? What is it used for? How does one use it? I've read bits and pieces about DE on this site but I just don't get the big picture. I've read about the kind they eat and the kind that kills bugs? I'm confused!! I'm in the process of building our chicken coop. It looks to be complete by this weekend. I plan to use the deep litter method. My chickens are 5 weeks old and 3 weeks old. Hope it's OK to post this question here as I don't know if chickens eat the stuff or dig around in it. Thanks!!