One of my pullets didn't come out to eat this morning with the others so we caught it to take a look at her. She seemed fine, though it concerned me that she was so easy to catch. I had thought it odd that for the last week she roosted away from the other birds, on the floor in a corner or behind anything she can hide behind. We removed her and she immediately perked up when we gave her food and water. But then we noticed that she wasn't opening one eye. We pulled it open and it seemed clear and watching her, we saw her open it on her own occasionally but not often. There is a little bit of crusty stuff in her muff, but not much and it isn't all over her eye. She's not coughing or sneezing. She makes soft little clucking noises when I walk in to check on her but she is eating and drinking. Any ideas? What can I flush her eye with? And should I put anything on it?