We have 1 of 9 chickens with this symptom. She is in about her 6th day of it and is not eating or drinking today, I think because she cannot see well enough to find the food. The bubbles cover about half of her eyes. We went to an avian vet yesterday and she didn't detect any respiratory problems, but since we live a long way away, she gave us antibiotics (Ciprofloxacin eye drops and Baytril pills). Have others had similar experience? Are there other things it could be? All the other chickens do not show any signs.