Looks like mild gout. Could be some arthritis depending on her age.I don't see green bruising in the photo, but I do see some swelling of both feet.
I wonder if this is Gout? @MysteryChicken
She does also have some raised scales, I'd apply a bit of Vaseline or Castor Oil to the feet/legs to help smother any developing Scaly Leg Mites and soothe the feet/legs.