Some of my chickens have a lice problem. I'm going to clean up the coop today. I would prefer not to use any drastic or radical measures. I want to still be able to eat the eggs. If I buy some DE and dust the entire coop and attempt to dust my birds, then leave a box of DE and ash for them to dust themselves in periodically, will that take care of the lice problem? I realize this method will take a while.