It's not an easy decision to make. I adopted quite a few vision impaired chickens (both genders). It took awhile to notice the problem, observe how it affected them, and make a plan to work with them.
The chickens do like their independence. Like humans, they adapt to their limitations. I had several that I really thought the most humane thing to do was to cull them. Instead, I worked out a new plan for them.
Like you, I had to put them on the roost and take them off the roost. I had to carry them into/out of their housing. They don't like it. Now I open up their space during bright daylight hours, tell them it's time to go to their room for bed. It's bedtime. I have sand on the floor, so it's softer when they get down. They are now the first ones in the their room for the night. They usually wait until everyone else has left before they jump down in the morning. I talk them out of the room and to the outside. Sometimes I have to herd them with my legs/feet. I talk them to the feeding station. When I have time, we go for walks together to practice following/listening/using my voice. I am blessed that I have the patience and the time to work with them. I'll keep them going as long as I can. When they tell me they are ready for chicken heaven, then they will go to chicken heaven.
Can you provide a lower/easier to access nesting spot for your girl?
I have a ramp for some of my girls (who are sight impaired). That makes it easier for them.
If you are close to WV or willing to meet somewhere, she could come here to live out her days. She'd be fine with my senior citizens.
