One of our hens, a Light Brahma, currently has one runny, puffy eye, and the surrounding facial tissues are puffy. There is some frothy discharge from the corner of the eye. Smells a bit but not terrible. The other eye is normal. No nasal drainage, no other symptoms at all. She's eating fine, no diarrhea. We have her isolated and have a call in to the vet, but I'm not terribly confident with our vet on chicken issues. No other symptoms from any other birds. Suggestions?