What a Cockatiel should eat changes across its life more than most owners expect. Portion size, not brand, is where most first-year problems start.
Changing food
Phase any change over a week. An abrupt switch upsets the gut and tells you nothing about whether the new food suits a tiny bird.
What “gentle” means day to day
The Cockatiel is described as gentle, whistlers, affectionate. Of those, gentle is the one that shapes an ordinary day most. It is easy to read as a selling point and harder to live with than the word suggests, because it does not switch off when you are busy.
Never feed
Avocado, chocolate, caffeine, alcohol and salt are toxic to birds.
A breed from Global / Various, living in India
The Cockatiel was developed in Global / Various. The part that travels badly is rarely temperament - it is the coat and the tolerance for heat. Plan the year around that and most of the rest follows.
Planning for about 17 years
A Cockatiel is with you for about 17 years. Budget and routine both need to survive that, including the last quarter of it when a tiny bird needs more veterinary attention than it did young.
Storage in an Indian climate
Humidity spoils dry food faster than the printed date suggests. Smaller quantities through the monsoon, sealed, and look at it before it goes in the bowl.
Balancing gentle against whistlers
Breeds described as both gentle and whistlers need the two managed together rather than separately. With a tiny bird that usually means a predictable routine first and training second - the routine is what makes the training stick.