I have a 20 week old pulley that has been super healthy up until a week ago. The past week she has not opened one eye and has been very lethargic - lays down in the middle of the yard a lot while everyone else is foraging. I've looked for other signs of infection- there is no discharge and her other eye remains normal. I am working on integrating her and her other pulley friend with my older hens. Should I be concerned or is this possibly just that she got pecked in the eye?