I was finally able to get some diatomaceous earth. I bought the Perma-Guard brand. I had to order it because I was not able to find any in the local stores. I have read that it is good for many different things including sprinkling it in the coop and run to prevent lice and mites. My question: should I apply it directly on my pullets as well (they are almost 11 weeks old), or is it just sprinkled around their living area? I was also thinking that maybe I should put some in their dust box as well. I am assuming that it is safe for them to ingest if the DE is in the dirt and on the ground because the package also mentions putting it in their feed.