John, I'm sorry that your question wasn't answered in a timely manner. We don't have many avian vets on this site. An avian vet (please see here: www.aav.org) might prescribe a nonsteroidal antiinflammatory drug (NSAID) such as meloxicam and reshape a damaged beak to make it less painful for your parrot to prehend and dehull seed but we don't have anything more than a well-balanced diet to "strengthen" these birds. This is a good opportunity to move her over to a pelleted diet and a broader selection of fresh foods.
Nutritional imbalances are a common cause of illness in our pet birds. What has her diet consisted of, please? 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.
Perhaps I've misunderstood you. Please let me know what you had in mind by what you can do to help regain her strength.