Can anyone advise me on how to apply Prozap individually to my birds to treat for lice? The can says 1 pound for 100 birds but I only have 7 and want to treat them individually. I've read here about the "shake and bake" chicken-in-a-bag method and about putting some around the vent and under the wings. But how much should I use for each bird? Can I overdose them? Any suggestions welcome! Thanks!!