I noticed yesterday that my pullet was closing her eyes when she was standing and not as active as normal. She ate and drank and does not have any discharge or swelling in eye area. I looked under her wings, fleshy parts- no mites or fleas. She flew out of her coop this morning and interacts off and on with the other chickens. The she will stand off on her own, eyes closed- right eye more then left, and eventually she will lay down and sleep with her wings out alittle bit. Only recent changes- I gave them a new snack of mealworms and shrimp - surf and turf from little farmer, which they seemed to enjoy. Also, we've had issues with mice and rats at night getting into the coop. Thank you for your help!!!