I have had a flea problem in our chicken coop area for the past 5 or 6 months or so. We have lost a few chickens I think because of it. I have one girl left! Just bought a batch of new layers and want to get the flea problem under control. I have tried everything it seems. Flooded coop with water, laid cedar shavings down. sprayed Permethrin and Sevendust as well. We get rid of them for a few days and then they are back. She has a sand bath and i know she uses it. I have no clue what to do! They are tiny little fleas, kind of hard to see but she gets covered in them and if I am not sprayed with bug spray they attack me. Our neighbor on the left side has no animals and keeps grass mowed regularly. neighbor in the back has about 5 acres with sheep running all down so grass is down all the time. We keep our yard mowed regular as well. They seem to only be in the chicken coop or that part of the yard anyways. Any suggestions on what I can do? Thanks so much.