Explanation... but if you want to get to my question it is below, bolded. My hens got lice. I started with DE and Poultry Protection. Well within two weeks the lice population EXPLODED and I lost a chicken. I had another very ill one so I took her into the vet to see what we could use to nip it in the butt ASAP. She said I had most likely lost that other bird do to anemia as the lice they were infested with (BAD) was biting lice. She examined them for a good 20 minutes under a microscope and sure enough, and all the ones she kept picking off or crawling off of her were filled full with my hens blood. So an awful lice infestation. I was told by the poultry vet to use permethrin powder on the birds and premise spray for my coop. My coop is kept extremely clean. It is a 8x12 walk in coop with wooden floor. I have poo boards that I scrap daily. I have 3" of sand as the bedding that I scoop daily. I also keep all feathers out. So she said to spray the coop down once with my mixed premise spray. Then she said to dust the chickens 3x every 2 weeks. My Question... The more I read after I got home everyone recommends dusting the chickens every week... I feel like if I wait and do it every 2 weeks I will never catch up on the egg/lice hatching. So I plan to do it every Monday for 3x,...?