Last week a young house sparrow with a tick very close to her eye started sitting alone on the feeder tray. Every time other house sparrows came along they'd fight with her and kick her off, then she'd be sat there alone even in the rain. I kept an eye on her, she was eating ok, just always alone. Then yesterday I noticed the tick had fallen off but she doesn't have a right eye! Could the tick have cause damage or could the eye have been missing from birth? I know she has virtually no chance of survival, but could that be why she's been rejected by others?? Thanks