It is not normal, and I have not seen that in any of mine (4 years). There may be some good articles regarding gender shifts in chickens, although I don't have the references at hand. Does she still lay?
btw - what color are her legs? The top photo appears white?
That's weird. It's only my legbars that have spurs too. They are both still laying blue eggs.
The one with the big crest has white legs, and the one with the smaller crest has yellow legs.
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