IF you can get a front face picture would be great cause from the partial looks of it she doesn't seem to be in breeding condition. As female budgies get into breeding condition their cere turns crusty brown. I also do agree that cage is not the best as the square cages are better. BUT instead of asking more questions for answers, like I've said we can only speculate, you really DO need to bring her to a vet for a better examination if your that worried about her!