We get a lot of inquiries about feeding parrots. I'm writing this to try to give people
a reference so they don't have to try to remember the information I give them.
I don't have any special insights into avian nutrition. What parrots eat in the wild is
still pretty mysterious. I suspect they are opportunists and eat whatever they can find.
The diet I feed works for me. My birds are healthy & produce fairly well, so I'll pass
my diet on to you. Use this as a guide, I make no claims at any expertise aside from my own experience.
I feed a lot of fresh produce. It's the bulk of my birds diet. Seed is provided to all
the birds, but I don' think it's as important nutritionally as the other foods. I have
my seed mix made for me. We have only larger birds and most of the seed mixes I tried
had too much small seed that my birds didn't eat. Seed is high in fat, fat birds aren't
healthy so I want them to have a variety that provides all their needs. Some parrots
like Macaws need a higher fat diet. Nuts are important in those birds diet. I'm not a
believer in pellets. I feel the birds needs are better provided with fresh foods. If you
want to add pellets I can't see where it would hurt, but personally I prefer to know
exactly what I'm feeding.
I try to give the birds everything they might need by feeding a pretty good variety of
foods. I also try to cover all the bases with a mix of greens, yellows/orange and fruit. Each
has different vitamin/mineral content that the birds need. Some species of parrot have special dietary needs.
Eclectus for example need vitamin A. Yellow/orange foods generally have high vitamin A content.
Here's a list of the foods I feed every day:
Apples
Squash
Broccoli
Cauliflower
Sweet potato or yams
Carrots
Corn
Greens (spinach, Kale,Bocchio etc)
Grapes
Papaya
Mellon
Citrus
Banana

Some of this needs to be partially cooked. Like Sweet potatoes & squash. I also cook the carrots. These foods are not very digestible raw.
I also spray it with a diluted vinegar/water solution to kill bacteria.
Then it goes in a food processor to make it bite size. Parrots like to take on bite & drop their food, so chopping it up prevents waste.

Corn does not go in the food processor. Corn gets cut in about 3/4 inch wheels and then quartered. That makes a piece that's easy for a bird to hold and not waste much. Other foods can be added as needed or as a treat. I sometimes add sprouts, garlic, peppers, eggs, etc. to my mix. Parrots also need protein. About once a week I give them some kind of protein. Such as cooked pinto beans, chopped boiled egg, cheese, or monkey biscuits. They don't need much. A pencil eraser size piece of cheese is adequate. This brings up another point I think needs to be addressed. Always remember you're feeding a bird that's not a large animal. A little bit may be good. A lot isn't generally better. Don't get carried away with the amounts of anything you feed. An example that sticks out in my mind is an Eclectus we sold to a local man. We told him Almonds were good for Eclectus. A couple years later we saw him & the bird. It had black wing feathers. I questioned his diet and what he described sounded fine. We finally found out he was feeding a half dozen almonds a day. Way too much fat for an Eclectus!

Food servings for inside birds

Since I have lots of birds to feed. I can buy produce in quanity. A person with one bird would waste a lot of food by feeding fresh foods. An alternative would be to use frozen vegetables and add some fruit to it. An advantage to frozen foods is that it's clean and fresh. Also you don't have to cut it up. A good mix of frozen vegetables would be an excellent diet for your bird.