It sounds to me like Tillie might be learning to deal with her new disability.
It also occurred to me that if she is able to scoop up water to drink, she may have more success with food if she is able to eat out of a feeder that allows her to scoop it up.
If she was able to eat a spaghetti noodle, i have great hope for her.
As to her nesting - i'm not sure what yours normally do, but mine often take turns going to the nest boxes while everyone else is outside scratching around. They just go as the need arises.
I also have some that sit in the nesting boxes with their heads to the back instead of the front.
If she's broody, she will stay in the nest box constantly, even all night.
It also occurred to me that if she is able to scoop up water to drink, she may have more success with food if she is able to eat out of a feeder that allows her to scoop it up.
If she was able to eat a spaghetti noodle, i have great hope for her.
As to her nesting - i'm not sure what yours normally do, but mine often take turns going to the nest boxes while everyone else is outside scratching around. They just go as the need arises.

If she's broody, she will stay in the nest box constantly, even all night.