I know how you feel we had an infestation last winter and it got to the point where we bathed all of them in our heated shop with flee and tick shampoo then put fontline on them then 7 dust burned all the bedding in the coop got de and lime after spraying permithin in every spot in the coop then put the de and lime in fresh bedding and then put the girls back in this is the only thing that worked for us best of luck