my favorite d'uccle hen is going blind in one eye! the pupil is becoming cloudy and blueish like she has cataracts, and she can't see out of it, but she's only 3 years old! i know chickens (and other birds) rely on sight more than any other sense! her other eye seems clear, but if she goes completly blind, she won't be able to do anything (eat, drink, roost, ect.) what can i do to help her?