That is not a good thing. Those are her down feathers, which are much finer than other feathers, and do look really "fluffy". It looks like she may be plucking, and if she has pulled a lot of her body feathers, her down feathers become exposed. Google "parrot plucking" and you will see what I'm saying. Another possibility is she has some kind of infection. Getting her looked over by a avian vet is something you need to do to verify the cause of the feather loss, and get professional advice on where to go from there.