I ordered about 18 chicks four weeks ago. They are staying with a friend until I get my coop, and run fininshed. The last few days I have been attacked by black flies! Their bite is horrible, and I have swollen up like crazy. I got on the net to reasearch what might repell them as the "Off" spray doesnt seem to bother them at all. I read that they can attually kill poultry! Anyone know anything about this? Im really concerned about bringing them hear now.