It's about 100 degrees here today, so I'm not sure why I'm planning for winter . . . wishful thinking perhaps. Anyway, I have increased the size of my flock 3-fold and I'm worried amonia will build up in the coop this winter. Called my feed supply store and they do not carry DE. He can get me some other stuff, I haven't seen it yet, he said it was a type of bacteria that prevents amonia. I asked him to get me a bag $30 for 20 lbs. I probably should wait until I see the bag and get more specific info. But before I do, has anyone heard of this type of treatment? Anyone using it, and is it comparable to DE?