So I understand now; she had normal feathers before she laid eggs and after the eggs she has deformed feathers? That does sound like a diet issue, sadly.
You cannot go back but you can go forwards and try again to help her eat better foods. I have a link to an article on feeding parrots. You can read that or take these few simple ideas from it: http://www.parrothouse.com/pamelaclark/ ... anion.html
Parrots are naturally inclined to eat at particular times of the day, early morning and late afternoon/evening.
Parrots are suspicious and unwilling to eat new things they have not seen and eaten before.
If you offer the new food at the time of day when the parrot is not already inclined to eat, the bird is not likely to try it.
If you offer the new food so it looks the same every day the parrot will get accustomed to seeing it.
If you eat the food when you give it to the birds it will help them understand it is food and be interested in eating it.
Therefore you should chop the vegetable and fruits so the bird always gets a colorful chopped mix that looks the same every day, even if you have included different foods.
You should present this food at the time of day that the parrot is already looking for something to eat.
You should show them how to eat it.
You can sprinkle some of the old food (the seeds) on top so that the bird will be drawn to the mix.
**You must still provide the old food, so the bird doesn't starve, of course.
You should expect that the new food will be not be eaten for weeks before the bird gets accustomed to it.
You should give it to them every day.
I would like to add that if one bird will eat it, the other should learn by watching. I know you are an experienced Budgie Keeper, so I don't mean to insult you by telling you these things you probably already know. Just, if you missed this, or somebody else is reading it could help them. Try to give the Budgies a whole leaf, maybe kale http://en.wikipedia.org/wiki/File:Kale-Bundle.jpg
or collard http://www.finecooking.com/item/5217/collard-greens
. Wet the leaf and do not shake it off, so water clings to it, and place it on the floor of the cage. Budgies may roll on the leaf to bathe and they may taste it, too. If the birds will not eat a chopped mix of vegetables, but they will eat a leaf, this is a great improvement, still, over only seeds. You can also hang a leaf from the wall of the cage where there is a perch, so they can lean against it if they want to. If Budgies like to chew on things, and it looks like they do
then make some toys out of food. I know you will be very good at this because I see you are clever and creative, as well as very loving to your birds.