I finally got my hands on what the feed store calls food grade DE. It has taken them about a month to get this in. Here is the website of what the stuff is. I want to make sure that this is the right stuff before I give to the chickens. http://www.planetnatural.com/site/diatect-v-insect-control.html Also, how much to put into their food? I also wanted to know if anyone uses Adams flee and tick mist on their chickens. I have heard it works well for mites and stuff? Please let me know.