Cockatiel diet: pellets, seeds and how to switch
Published by Planète Pets · managing editor: Clément Lacaille · reference guide rewritten with every source checked
Cockatiel : A base of small-parakeet pellets topped up with seeds, leafy greens and a little fruit. Cockatiels are prone to weight gain, so keep sunflower seeds for training sessions only.
An accessory from our shop for this use: Acrylic no-mess feeder for budgies (13 × 11 × 13 cm) (€33.90) · the whole shop
Outside our shipping area? The downloadable practical guide: Budgies, Cockatiels and Canaries: The Starter Guide (€13)
The short answer
A cockatiel should eat complete pellets as the base, topped up with measured seeds, leafy greens and a little fruit. A seed-only mix, still very common, is unbalanced; sunflower seeds, which are very fatty, are best kept for training sessions. For a bird of 80 to 120 g that is prone to weight gain, what goes into the bowl matters more than how much.
Why move away from an all-seed diet
Seeds are not poison, but a diet made only of seeds lacks essential nutrients: the study by Cummings and colleagues, published in 2022 in the Journal of Avian Medicine and Surgery, notes that the deficiencies of seed-based diets have been linked to physical and psychological problems in captive parrots. Pellets deliver every nutrient in every bite, so the bird cannot pick out its favourites. If your cockatiel sorts its seeds and leaves the rest, it is building itself an unbalanced diet. Our article on too many sunflower seeds shows how that mistake sets in.
| Food | Place in the diet | Precaution |
|---|---|---|
| Small-parakeet pellets | Base of the diet | A complete food: do not add vitamins without veterinary advice |
| Seed mix | Measured supplement, not free-fed | Blow away empty husks: a bowl full of shells only looks full |
| Sunflower seeds | Training rewards only | Very fatty, count them in the daily total |
| Leafy greens | Every day, fresh and washed | Remove leftovers after a few hours |
| Fruit | A little, as a supplement | Remove stones and pips; never avocado |
| Cuttlebone | Always available | A mineral source to chew, not a substitute for a complete food |
| Water | Changed daily | Clean the drinker, especially if the bird dunks its food |
For vegetables, our guide to which leafy greens to choose sorts them out. Foods to ban (avocado, chocolate, alcohol, caffeine, onion, garlic…) are detailed in our list of toxic foods for cockatiels.
Switching from seeds to pellets: what the study found
Owners’ most common fear is that the bird will refuse pellets. Cummings and colleagues asked avian vets to offer three conversion methods to owners, who then applied them at home:
- “Birdies Choice”: three different pellets offered on a tabletop, with a reward when the bird eats some; the favourite is then gradually moved into the food bowl.
- “Slow and Steady”: pellets alternate with the usual food at varying intervals, to increase exposure.
- “Tough Love”: a small portion of the usual food for a limited time, with several bowls of pellets always available.
The result: 96% of birds converted whatever the method, and 57.5% did so within the first 7 days. Age, sex and family (including the cockatoo family, to which the cockatiel belongs) made no significant difference to conversion time; only the method mattered, with “Tough Love” being the fastest. Most birds had switched within the first month.
Two caveats: the results rely on owners’ survey answers, and conversions were carried out with an avian vet’s support. A strict method is therefore not something to improvise: weigh your cockatiel every day during the switch with a precision scale, and go back to the usual food if it loses weight or its droppings change. Our step-by-step guide to switching from seeds to pellets covers the stages.
Vitamin A: the extra-supplement trap
A seed-fed cockatiel is often short of vitamin A, hence the temptation to add vitamins to its water. The study by Koutsos and colleagues, published in 2003 in the Journal of Nutrition, shows that in adults an excess is riskier than a shortfall. Twenty-two adult cockatiels were fed diets with 0, 600, 3,000 or 30,000 µg of vitamin A per kilo for almost two years (up to 706 days). At 30,000 µg/kg the birds developed pancreatitis and markedly altered vocalisations; at 3,000 µg/kg, signs of toxicity were already appearing. Birds deprived of vitamin A showed no classic deficiency signs after almost two years, only a reduced immune response and altered vocalisations. The authors conclude that adults at maintenance are more susceptible to toxicity than to deficiency, and suggest a possible link with behaviour problems.
In practice: a complete pellet already provides the vitamins; do not add a supplement without veterinary advice. The signs of deficiency in a seed-fed bird are described in our article on vitamin A in cockatiels; only an avian vet can make the diagnosis.
What we checked
- Both study DOIs were resolved on Crossref and their abstracts re-read on PubMed; the percentages, doses and durations quoted come from them.
- The weight (80 to 120 g), base diet and tendency to gain weight come from our cockatiel attribute database.
- We did not test pellet brands and recommend none; no gram-by-gram ration is given because we have no verified source for one.
Sources
- Cummings AM, Hess LR, Spielvogel CF, Kottwitz JJ (2022). An Evaluation of Three Diet Conversion Methods in Psittacine Birds Converting from Seed-Based Diets to Pelleted Diets. Journal of Avian Medicine and Surgery, 36(2), 145-152. doi:10.1647/21-00025
- Koutsos EA, Tell LA, Woods LW, Klasing KC (2003). Adult cockatiels (Nymphicus hollandicus) at maintenance are more sensitive to diets containing excess vitamin A than to vitamin A-deficient diets. The Journal of Nutrition, 133(6), 1898-1902. doi:10.1093/jn/133.6.1898
Frequently asked questions
Can a cockatiel live on seeds alone?
It can survive, but an all-seed diet is deficient and has been linked to physical and behavioural problems. Complete pellets as the base, with measured seeds on top, are the better choice.
How long does it take to switch a cockatiel to pellets?
In Cummings’ 2022 study, 57.5% of parrots converted within 7 days and most within the first month, with a 96% overall success rate. Weigh the bird daily during the switch.
Should you give a cockatiel vitamins?
Not if it eats complete pellets, which already contain them. In adults, excess vitamin A proved more harmful than deficiency (Koutsos, 2003). Any supplement should be decided with an avian vet.
Which foods are forbidden for cockatiels?
Avocado, chocolate, alcohol, caffeine, onion and garlic above all, plus salty or cooked human food. If your bird eats any, call an avian vet straight away.
The guides that apply to you
- Cockatiel diet: seeds, pellets, and fruit
Feeding a cockatiel well: the limits of an all-seed diet, the value of pellets, the share of vegetables and fruit, and preventing obesity in this bird.
- Budgie and canary diet: seeds, pellets and fresh food
What should a budgie or canary eat? Why a seed mix alone is not enough, where pellets and fresh food fit in, and the mineral trap owners often miss.
- How Much Food Should You Give a Bird Each Day?
How much seed, pellets or fresh food should a bird eat each day? Guidelines by size and signs that a ration needs adjusting.
- Cockatoo diet: preventing obesity in a greedy bird
The pet cockatoo is a prime candidate for obesity and fatty liver. Pellets, rationed seeds, foraging: the strategy to keep it fit.