Just my 2 cents, but birds need animal or insect protein; but then, I feed my dog RAW, 'cause I believe an animal with 99% wolf genes probably ought to eat a lot like a wolf... If you can trust the *quality* of the animal protein in the brand of feed you use, then that's awesome. I don't want to research all the companies... and my local feed store is no help anyway, so I'm using that annoying Pearsons square... and my protein sources are Ferm'd or cooked beans, mealie worms, and my husband is constructing a BSF bin that hopefully will be all figured out for fall. I also feed them any meat leftover bits (if you don't eat meat, that's a bit tricky, but if you have a dog and feed RAW like we do, lots of bits about) we have. Local peeps drop by their crab carcasses, and we CL and freecycle grab fish carcasses and whatnot as well.
Good luck! Bet your birds look better than anyones around, no matter what!