You know, EVERYONE has been complaining the mites and lice have been BAD this winter- even people who normally don't have a problem with them. I treated all the adults a few weeks ago but missed the grow coop- checked them last weekend and they were CRAWLING. Ick! Even found some on some 5 week old brooder chicks in the shed- no idea HOW that happened unless I accidentally transferred them to the chicks during regular chicken chores!