Help! I have a small flock of 20 hens of various breeds. They free range daily and therefore they do come in contact with other birds. Last spring one of the girls started showing symptoms of feather lice. As recommended I completely cleaned the coop removing all the old bedding, sprayed the coop down with Neem oil (while the girls were out of course), spread DE on the roosts and nesting boxes and then replaced all the bedding with new. I have continued to rotate all of the bedding at least once a month and spray the coop down at the same time. I still cannot seem to keep my girls lice free. It seems at least one of them is suffering from the nasty little bugs all the time! From reading other posts I thought having access to frequent dust baths was supposed to control feather lice. My girls have constant access to dry dust beds with different options for their bathing delight including straight up dirt, wood ash mixed with sand and now dirt with some DE mixed in. What am I missing or what else can I do? Thanks for your suggestions! I feel like a bad Mother Hen for not being able to keep my girls debugged.