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It looks like fowl pox. I'd like you to open her mouth and look for any lesions, particularly the roof of her mouth and the back of her throat. If you dont see any lesions, that's good.
If you see any lesions, smell her breath and let us know what color are the lesions. Good luck.
Where exactly are the lesions located in her mouth and what color are they? There is no nasty foul odor, correct?
I need this information to determine whether it's wet fowl pox or canker and to give you correct treatment. Wet pox can cause a bird to starve to death. Canker can spread quickly and infect your flock for the rest of their lives.