Can you have other cockatiels in the same cage as a breeding pair of cockateils?

No, it is not advisable to have other cockatiels in the same cage as a breeding pair. This is because breeding pairs are very territorial during the breeding season, and they may become aggressive towards other birds in their cage. This aggression can lead to injury or even death to the other cockatiels.

If you want to keep multiple cockatiels, you should provide them with separate cages. This will allow them to have their own space and will reduce the risk of conflict. You can then introduce the cockatiels to each other gradually, outside of the cage, to see if they get along. If they do, you may be able to house them together in a larger cage, but it's important to monitor them closely for any signs of aggression.