We have a mite - y problem, though haven't seen excessive behavior...just for the last week I come out of the coop feeling buggy & saw one on my friend yesterday. Probably came with the grown Rhode Island Reds we got & didn't check them over. We are using the deep layer method, with pine shavings and a covering layer of DE food grade & alternating. The matted down layers are about 4 inches or more after a month of doing this, and I wonder if we need to remove all the layering, clean, spray with citrus oil and then start the layering over. Plus, dust the birds with DE, of course. We have 24. As we are new to the 'layering', we don't know if there is any way that is better than another. Any suggestions/comments on the layering, the mites or anything else:rolleyes?