New Chicken owner here. I have had my pullets for 9 days. One of them (an Easter Egger aprox 8 weeks old) didn't leave the coop this morning with the others. Eyes were closed, perching. I removed her for 4 hours to a separate crate and put a warm water compress on her eyes. She perked up after a couple hours and I returned her to the flock. She's displayed generally normal behavior the rest of the day (maybe a bit more resting) HOWEVER, she still keeps her eyes closed a LOT. Advice?