a little chickeneverybody seems to have good advice, specially Desrtmarcy, she has loads of experience. I use DE, Poultry Powder (sometimes mixed), bathing in Dawn then blow dry. So far it has worked for me. As long as I fallow up with cleaning area, spraying, powdering and so forth. The bathing was for a girl I counted more then 10 on. The figure is for every 1 there are 100 - 500 you do not see. It must be true, on the one I washed she was infested. She had colony's I discovered on her feather roots in one spot. She was sick and weakened so the mites and lice moved in, they, I am sure were making her sick. She had bugs in several stages of life dying on her. I Fallowed up every few days, (all my girls do to association). sense it was not sure of life cycle of mites for a couple of weeks.
I had a covered kennels. Doves would get in, I trapped them caught them, sprayed and powdered them, then released them.