I have 8 birds... I have checked 4 so far and have not seen any evidence of lice. I am checking around vent but I suspect I should also check under wings as the one I saw was white, long and narrow. Anyhow...While cleaning out coop I found this lice on a loose feather in coop. I will treat ALL the chickens just to be safe, but... 1. what should I treat them with? I think it is wing lice. 2. I use sand, which is mostly PDZ...do I need to switch out the bedding? That is ALOT of heavy stuff to haul away. Is there a way to treat the pdz/sand? Please say there is. This will be costly if not. 3. They are dust bathing under coop-I threw some DE I got at feed store under there today to add some dust to the dust... 4. Anything else?