* Apples
* Bananas
* Berries (such as blueberries, raspberries, and strawberries)
* Cherries
* Grapes
* Mango
* Melon
* Nectarines
* Oranges
* Papaya
* Peaches
* Pears
* Pineapple
* Plums
Vegetables: Cockatiels can also eat a variety of vegetables, including:
* Asparagus
* Bell peppers
* Broccoli
* Brussels sprouts
* Carrots
* Cauliflower
* Celery
* Corn
* Cucumbers
* Green beans
* Kale
* Lettuce
* Peas
* Potatoes
* Pumpkin
* Radishes
* Spinach
* Squash
* Sweet potatoes
* Tomatoes
* Turnips
Grains: Cockatiels can eat a variety of grains, including:
* Brown rice
* Buckwheat
* Millet
* Oats
* Quinoa
* Whole wheat bread
Nuts
Cockatiels enjoy eating nuts, including peanuts and certain tree nuts. Ensure the nuts are unsalted and unseasoned.
Seeds: Cockatiels can eat a variety of seeds, including:
* Flaxseed
* Hempseed
* Niger seed
* Safflower seed
* Sunflower seed
Insects: Cockatiels can also eat a variety of insects, including:
* Mealworms
* Crickets
* Grasshoppers
* Dubia roaches
Note: Cockatiels should not eat avocado, chocolate, or any food that contains caffeine.