BirdTricks has a cookbook filled with nutritional guides, recipes, holiday recipes, and the daily diet they give their birds.
TOP’s Parrot Pellets™ are USDA Organic Certified and perfect for parrots of all sizes, from macaws to budgies. Our signature, proprietary pellets, which measure 1/4" in diameter, are made with all organic ingredients from the United States and are cold-pressed to keep the natural nutrition...
topsparrotfood.com
Congo african grey Q: Why won’t MY bird eat fruits and vegetables? – Peter L., Minneapolis, MN A: Getting your bird on a proper diet is the single biggest challenge faced by bird owners. The challenge itself is two-fold: 1) getting the owner to understand the meaning of the term “good diet” –...
birdtricksstore.com
Natural Feeding System (Digital Download) (They also have a physical cookbook, but it costs 80 bucks)
There's a brand of Tops pellets that you should check out.
And do you have a scale? A gram scale is pretty important for weighing a bird after it's had it's morning poop but before breakfast and write it down in a chart. If it's lost ten percent of it's weight over a month, vet time. I've been looking for an accurate kitchen scale because the Zieis bird scale, which is actually a kitchen scale, costs like 65 bucks.
So the best thing I've heard is look online, find a five star review, read the reviews and then buy it and take it to the vet and see if the weight is the same. If not, each one is like twenty bucks, you could just buy another one.