I have a 9 month old naked neck hen that was hatched at our farm, she was born with a huge fluid pocket on the back of her head/neck She could not balance, stand, walk or even sit without my help because she was so top heavy. I refuse to give up on her, I set my alarm and gave her electrolytes, fluid and food around the clock. my husband and brothers said that she wouldn't survive but… She did and she is the most amazing chicken, she has a personality all her own. Her name is Pek and she is also the surrogate mom to all the chicks that are born here. She is scared of the other chickens, but she absolutely loves the babies. Anyways I don't believe that Pek can see or at least not well. Until I actually touch food to her beak she does not know that it is there. She doesn't react to worms being tossed while everyone else notices the slightest peice of grain fall.; Her eyes are both all black...different from the other chickens..? She also has a hard time if anything gets moved around in the coop.. So I was wondering if the blindness or sight impairment could be from the pressure of that fluid filled pocket that she had for the first couple months of her life. I would also like to know what that fluid filled pocket wasnand if it is common? I have only gotten into chickens approximately the last 18 months so I am still learning but I am totally in love.