Hi I bought 2 9 month old chickens from a girl a few months ago and added them to my flock, well now all of my chickens have lice and I can not get rid of it, I have used damacious earth on them and made a dust bath area with damaciouse earth mixed in and I have also put garlic powder in their feed, but its not working. I am very frustrated and ready to just get rid of them all and start over. Does anyone have any advice/help they can give me. I have heard of using seven dust but I am really worried about using stuff like that since I have a veggie garden and strawberry boxes near my chicken coop. Ok well thanks for any help!!!