One of our ex-battery hens recently went blind (she had lost one eye a long time ago, and went blind in the only good one); she is probably about 6 years old now, been with us for some 4 years for sure. When I noticed she was sleeping in the nest all the time and didn't touch food or water, I thought she was going to pass away soon, and we took her home just to pass away in peace and quiet. However, when offering her food and water at home, dipping her beak into it, I realized that she wants it but cannot see it, so I had to hold it before her for a few days and now she is slowly getting used to where the containers are. Over some 10 minutes she pretty much fills her crop. Her sister went blind in both eyes last winter and lived with us for about 2 months until she had to be put down due to seizures - she had learned perfectly well where the food and water was in her crate, and didn't depend on me for feeding her at all - she even ate a lot of the regular "chicken yummies" that I normally give to others, and used to walk around the room and scratch in old clothes too! I hope this girl will live comfortably also until her time comes to pass away.