I use DE on a regular basis, in the run, in their sandbox, and in the coop and nest. I noticed yesterday a hen kept picking at my rooster so this morning my husband catches "Randy" and I have a look see and low and behold he has what I think are mites. He doesn't seem to ever dust bathe so I'm wondering if this is the reason he has this particular issue. If he has them then I can assume the rest do correct? I have seperated him, dusted him with DE and put some blue-kote on his raw spot. He is not a happy camper at all. Why if I use DE on a regular basis am I having this issue. We have been getting alot of rain due to Hannah and those other mean hurricanes that won't go away. Could it be the wetness? Should I go to the feed store and purchase something else to treat the rest of them? Should I change all the deep bedding in the coop? I was trying to wait for dryer and cooler weather to do this but will do it now if it's needed. I searched for Mites and got the nice long dicussion on Sevin vs. DE but it doesn't really point me into the direction I feel I need to go with this issue. Please help me experienced Chicken owners Any help is much appreciated.