My Easter Egger hen, roughly 9 and a half years old, has progressively been losing her vision. The other day we found her continuously turning her head as though she were dying, and when my mom picked her up, she rolled onto her back (she would NEVER do this) but she didn't do this when I picked her up. After about 10 minutes, she snapped out of it, and 2 days later she's doing it again! Although this time she seems more alert. She drank water not too long ago and I've been trying to convince her to eat. Is this some sort of sickness that we can cure or is she dying of old age?