I have an 6 month (ish) old hen who's eyes have crusted shut. Her eyes are not puffy or red but have a clear discharge that dries and, obviously, crusts over. She is otherwise acting normal....other than the fact that she can't see with her eyes shut and is a bit mellow until I open them then she's back to 100% normal. Does anyone have any idea if it is a simple eye infection and if it can be treated...with what??? or if it is more. She is one of a flock of 10 who, other than her, are all fine.