Did a bit of Googling, and I wonder if it is a sign of a vitamin deficiency. I also saw another thread from BYC from a while back about a hen with similar issues. Riboflavin? I think a B complex was suggested.
I caught seem to find it now, but I think @Eggcessive offered some good advice about...
It seems as though her toes are bending??? Am I seeing that right? And it appears to be happening on both feet. I don't have any clue why that is happening, but I doubt it's injury related unless she injured both feet... I hope someonewith more experience/info checks out that video.
Fingers...