Cockatiels are capable of laying eggs as early as 6 to 9 months of age, although some may not lay their first egg until they are a year or more old. Female cockatiels are the ones that lay eggs, but they do not need a mate to lay eggs. However, without a male mate, the eggs will not be fertilized and will not hatch.
Cockatiels may lay eggs year-round, but they are more likely to lay eggs during the breeding season, which usually starts in the spring and lasts through the summer. In some cases, female cockatiels may lay eggs even if they have not mated with a male. This is known as a "phantom" or "infertile" egg.
If you have a female cockatiel that is laying eggs, it is important to provide her with a comfortable and safe nesting box or area where she can lay her eggs. It is also important to provide her with a nutritious diet that includes calcium, which is essential for egg production. However, if you do not plan to breed your cockatiel, it is recommended to remove any eggs she lays to prevent her from becoming egg-bound or developing other health problems associated with excessive egg-laying. It is also important to monitor your bird's behavior and health and seek veterinary care if you notice any unusual symptoms or changes in their behavior.
Cockatiels generally begin to self-feed between 6 to 8 weeks old. However, the timing of self-feeding can vary depending on individual bird development and other factors such as the availability of food and the feeding practices of the caretaker. It's important to provide a well-balanced diet of pellets, fresh fruits and vegetables, and occasional treats to encourage healthy eating habits in young cockatiels. It's also important to monitor their eating habits and weight regularly to ensure they are getting enough nutrition and staying healthy.