My pet grey, Idgie, loves to dunk her monkey biscuit and millet seed in her water before she eats it. Birds are like most kids. They will not make wise nutritional choices on their own and are usually afraid of trying new foods. Be patient when offering new food and be sure to keep offering it until the bird accepts it. Use fresh or frozen vegetables but stay away from canned because of the sodium content.
Some birds can be wasteful.
Some eat every bite. Juices are okay also. No sodas please. Caffeine is toxic to your bird. Pasta, cooked rice, tortillas, and pizza crust are favorites.