Short answer: Most pet parrots, including budgies and cockatiels, should eat a diet built on a good-quality pelleted food, with fresh vegetables and a little fruit making up most of the rest and seeds kept as treats. UC Davis recommends roughly 50–75% pellets and 25–50% fresh vegetables and fruit, and VCA recommends 60–80% pellets for budgies. Seed-only diets are a leading cause of preventable illness in pet birds.
Diet is one of the most misunderstood parts of pet bird care. A seed-only diet, while traditional, is now understood to be nutritionally incomplete and a leading cause of preventable health problems.
Why Do Seed-Only Diets Fall Short?
Seeds are calorie-dense but nutritionally narrow. VCA’s budgie feeding guide says commercial seed mixes are high in fat and carbohydrates, low in protein and lacking essential vitamins and minerals, and that budgies often pick out only one or two favorite seeds, frequently millet. The Merck Veterinary Manual adds that seed-based diets are low in calcium and vitamin D and high in phosphorus, and that sunflower seeds, a favorite of many parrots, are low in calcium and protein and high in fat. The results can include:
- Vitamin A deficiency, which Merck calls common but often overlooked
- Obesity and fatty liver disease, which VCA notes can be fatal in budgies and cockatiels
- Metabolic bone disease from low calcium and vitamin D
- Goiter in budgies, from iodine-poor seed, which can cause wheezing, clicking and voice changes; see why a budgie stops chirping
VCA also warns that “molting,” “song” and “conditioning” foods are usually just different seed mixes, and that no regulatory body certifies avian diets, so a “complete nutrition” label isn’t a guarantee.
What Does a Balanced Diet Look Like?
Veterinary sources agree on the shape of the diet, if not the exact numbers:
| Component | Recommended share | Notes |
|---|---|---|
| Pellets | About 50–75% (UC Davis); 60–80% for budgies and 75–80% for cockatiels (VCA) | Choose a size made for your bird; UC Davis advises 100% pelleted foods, not pellet-seed mixes |
| Vegetables and some fruit | 25–50% (UC Davis); no more than 20–25% (VCA) | Mostly vegetables and dark greens; fruit in smaller amounts |
| Seeds, millet and treats | A small portion | VCA suggests millet spray only once or twice a month for budgies |
| Fresh water | Always available | Change daily; wash bowls in hot, soapy water (Merck) |
Portion sizes for “people food” are tiny: VCA suggests a thumbnail-sized amount for a budgie and about a teaspoon for a cockatiel, each the equivalent of a dinner plate for a person. According to VCA, a bird getting 75–80% of its diet from pellets generally doesn’t need vitamin supplements; use supplements only on your vet’s advice.
Which Vegetables and Fruits Are Best?
UC Davis highlights orange vegetables high in vitamin A, such as yams and sweet potatoes, carrots, squash and orange bell peppers. VCA’s list of suitable foods for budgies also includes broccoli, kale, spinach, romaine lettuce, bok choy, peas, corn, cooked beans, apple, berries, mango, papaya and cherries without the pit. VCA advises cutting food into bird-sized pieces, serving it in a separate dish, and removing it after a couple of hours so it doesn’t spoil. Pale, watery vegetables such as iceberg lettuce and celery offer little nutrition.
What Foods Should Birds Never Eat?
Keep these away from any pet bird:
- Avocado: Pet Poison Helpline warns it can cause sudden death in caged birds
- Chocolate, coffee, tea and other caffeine
- Alcohol
- Very salty foods such as chips, pretzels and salted popcorn
- Xylitol and other sugar-free sweetened products
- Onion, which VCA lists as potentially toxic, and apple seeds, which VCA advises removing
For the reasons and sources behind each, see our full list of foods toxic to pet birds.
How Do You Transition From Seeds to Pellets?
Birds can be stubborn about unfamiliar foods, but it usually works. In a 2022 study in the Journal of Avian Medicine and Surgery, 96% of parrots converted to pellets regardless of the method used, and 57.5% converted within the first week. UC Davis suggests this approach:
- Measure first. For one week, measure how much seed your bird actually eats per day; that is the total daily amount of food to offer.
- Mix gradually. Offer 25% pellets and 75% seed for one to two weeks, then 50/50, reaching 100% pellets plus fresh vegetables by weeks three to four.
- Weigh daily. Use a gram scale; UC Davis says a bird should lose no more than 1–2% of its body weight per week during conversion. Call your vet if weight drops faster.
- Try tricks for fussy eaters. VCA suggests offering pellets first thing in the morning when the bird is hungriest, spreading them on a flat surface for ground feeders like budgies, or crumbling pellets onto a favorite moist food.
Check with an avian vet before starting, especially for older or unwell birds.
Do Different Birds Need Different Diets?
Yes. The guidance above fits most pet parrots, including budgies and cockatiels. Merck notes that nectar-feeding birds such as lorikeets need a special nectar diet and are sensitive to excess iron, so they shouldn’t be fed high-iron pellets or citrus. VCA explains that budgies don’t need grit, because they hull their seeds, and may even overeat it and develop a blockage; only birds that swallow seeds whole, such as pigeons and doves, need it. Egg-laying, young, stressed or ill birds can have special needs, so ask your vet.
A nutritionally complete diet is one of the biggest factors in a pet bird’s long-term health, and it also affects how long a pet bird lives.
This article is for informational purposes only and does not replace guidance from your veterinarian.
Sources
- UC Davis School of Veterinary Medicine — Bird Diet Conversion, April 2019
- VCA Animal Hospitals — Budgies - Feeding, October 2022
- VCA Animal Hospitals — Cockatiels - Feeding, February 2025
- VCA Animal Hospitals — Common Conditions of Pet Birds, January 2023
- Merck Veterinary Manual — Nutritional Disorders of Pet Birds, May 2026
- Merck Veterinary Manual — Feeding a Pet Bird, March 2026
- Cummings AM, et al. — An Evaluation of Three Diet Conversion Methods in Psittacine Birds, Journal of Avian Medicine and Surgery, August 2022
- Pet Poison Helpline — Top 5 Toxins for Companion Birds
