The feather loss in your little prolific egg producer is normal. They're used to build nests. Most important at this time is providing a diet very rich in protein and calcium so she can continue to produce eggs and feathers without draining herself of those nutrients. Nutritional imbalances are a common cause of illness in our pet birds. Seeds should compose less than 20% of her diet. A diet of mainly seed and nuts has excessive fat, carbohydrates, and phosphorus; marginal protein; adequate vitamin E, and are deficient in amino acids, calcium, available phosphorus, sodium, manganese, zinc, iron, vitamins A, D3 (necessary for efficient absorption of calcium), K, and B12, riboflavin, pantothenic acid, choline, and available niacin. Ideally, a balanced pelleted diet such as can be found here: www.harrisonsbirdfoods.com or here: www.lafeber.com/pet-birds should be fed as well as hard boiled egg yolk, pancakes and cornbread, the tops of fresh greens, dairy products such as yogurt and cheese, fresh fruits such as apples, pears, melon, kiwi, and berries, vegetables such as broccoli, carrots, beets, asparagus, cabbage, sweet potato, and squash, and even tiny pieces of meat.
There are various methods to curb egg production should that be your wish. Please take a look at this link and scroll down a bit to "Things you can do to discourage / stop your bird from laying eggs". Please respond with further questions or concerns if you wish.