Ok so here's my problem. I am trying to keep my chickens natural no meds ect. I bought a fifty lb bag of DE when i got my chickens and i spread it all over the coop floor (block building with hay on the floor) in the nesting boxes and even mix it in their food( it is food grade) and i do this once every two weeks as i clean out the coop and lay new hay. One of my maran roosters was acting strange so i picked him up to check him out and he has mites under his wings? I heard that DE would kill parasites so im kinda confused on this one am i doing something wrong?