Help! About 6 weeks ago, I gave away 3 roosters and bought 3 hens at a local sale. They are small (5 months old) white chickens and one of them has been acting lethargic for the last few weeks. She looks like she's blind in one eye and has an oily looking ring around her back and has been pecking at herself. We have isolated her and she seems to be feeling a little better, but not great. Our hens that were laying reliably before getting the new hens have all stopped laying. We have wormed them and are giving them electrolytes. My husband has ordered some sort of respiratory medicine and a broad spectrum antibiotic, but we haven't received them yet. Has anyone had this happen before??? I'm concerned that we bought sick chickens and that all of our chickens are going to get sick. We live in Mississippi, but have been keeping them in the shade and have a shade cloth over their run. Any suggestions are appreciated.