I recently added *quite* a few new birds from two breeders who were down sizing. Both were NPIP certified and I was short on housing for all the different ages I acquired, so I took a chance & penned them separately within my very large main coop & run. One of the breeders warned me 2X to check regularly for lice *after* I housed them together. Now I'm feeling worried... I haven't noticed any lice or mites yet, but should I treat them all as if I did? Could I just add a small amount of Permethrin powder to their favorite dusting spots as a preventative & then spray directly if I see anything?