Hi,
It sounds like you haven’t given her a chance to bond with a mate. Parakeets should be at least 2 years old before you breed them. Once you put a male & female together, you need to give them time to bond as mates. They do not always like the mate we choose for them, but you have to leave them together or she will never have a chance to bond with a mate. You should only have one pair in a cage for breeding. They need to get used to each other first. If they bond, they will start sitting together a lot, grooming each other, feeding each other and finally they start mating. This is when you give them a nest box. They need privacy and should not be let out of the cage. They need to be on a balanced diet like pellets – not a seed mix. You should also offer greens, veggies and if they do start mating and exploring the nest box, you should offer cooked egg. If a new pair is getting along, it might take a year for them to fully bond and think about raising chicks. For some it might be longer. If their diet isn’t good, or they aren’t in a private, quiet location, they are not likely to breed. Mating does not have to result in eggs. Before you decide this hen can’t produce eggs, give her time with a mate. When you keep changing mates, she will never settle down and it will take time for her to trust that her next mate will not be taken away. The male helps with the eggs and chicks, so the male has to remain with her.
Thank you for asking Lafeber,
Brenda