I went to my local feed store and asked if they had Stall Dri. He said he did, which I was thrilled since I cant find DE around here, and have not wanted to pay for the shipping. Well when I got home I realized what he loaded into my car was Dry Stall which is not the same thing... having never bought either I didn't even think to double check first, live and learn right? lol I am wondering if I should just return it, or if can I still put in under the course sand I plan on switching my run floors to. I have straw now which is really not working well for us. Dry Stall I have is "naturally occurring lightweight volcanic aggregate" For absorbing moisture, minimizing odor/ammonia smell, softening hard clay ground. For indoor and outdoor use, no removal needed. Can also be used as or in addition to cat litter and growing orchids... go figure... Will this be safe for my chickens. It will be on the bottom layer of the dirt floor, but obviously they will dig and I am concerned about them eating it... Thanks for any advice/info!