My Silver Leghorn hen is probably four or five years old now. She has been blind since she was little, and hasn't ever had health issues until now. She looks pretty sick and I don't know how much longer she will live. One side of her face is normal, but the other is covered with wart-like sores. They keep getting bigger and worse. Her eye isn't visible due to the swelling and the fact that her eye is foaming. I have searched all sorts of poultry disease sites, but haven't found any close matches. She doesn't seem to have any other apparent symptoms. She has gotten a little lazier than she used to be. She has been staying out in the yard and on the porch for the past few days so the other chickens won't get sick. If you have any suggestions, please let me know. We put some iodine on them, but it didn't seem to make a diffference. We got a antibiotic for her water, but then realized it isn't for chickens over 16 weeks of age. Should I give it to her? I can send pictures if anyone thinks thay can help.