Cockatoos don't just recognize one owner. Cockatiels have a weak memory and will forget their owners if they are separated from them for a long time. Therefore, if a cockatiel changes its owner, and the new owner treats the cockatiel very well, often feeds the cockatiel and plays with it, over time the cockatiel will forget the original owner and recognize the new owner.

Notes on training cockatiels to recognize their owners:

1. Cockatiels should be trained by a fixed person. Do not change people at will during the training process. Try to let the owner Train yourself.

2. After the cockatiel is familiar with the environment and its mood is stable, you can try to put your hand into the cage. After the cockatiel gets used to it, slowly try to put food on your hand and let the cockatiel eat it. Eat with your hands.

3. You can talk to the cockatiel every day, and the tone should be gentle, so that the cockatiel becomes familiar with the owner's voice. Be careful to stay away from the cage at the beginning, and then slowly get closer after the cockatiel gets used to it. Until the cockatiel can accept the owner approaching the cage and talking.