No. Avocado is one of the most dangerous foods for parrots — every part of it contains persin, and even a small bite can be fatal.
Avocado is toxic to every parrot, and cockatiels are no exception. And because cockatiels are so small, even a tiny amount is a dangerous dose. Never offer it — see the emergency steps below if your bird already had some.
Avocado contains persin, a fungicidal toxin that birds cannot metabolize. In parrots it damages the heart muscle and causes respiratory distress, weakness, and sudden death, sometimes within hours. Sensitivity varies by species and individual, but there is no known safe amount.
If your parrot ate any amount of avocado, treat it as an emergency. Remove all remaining food from the cage, note what and roughly how much was eaten, and call an avian vet or an animal poison control hotline immediately. Do not wait for symptoms — early treatment makes the difference.
See the full avocado guide or the Cockatiel diet guide for more.
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