Any possibility that she might have gotten them frozen or that their might be a string wrapped around them cutting off circulation?
If they were frozen, they will dry up (they are in effect dead) and fall off. If only a couple of toes are affected, a bird can still have quality of life.
There doesn't appear to be any inflammation and I would guess that she is getting around OK. Such birds frequently walk with an exaggerated gait after this has happened, but they do fine.