Our expert says:
Female birds may lay eggs even if there is no male present provided they receive the correct stimulation - such as a high fat diet, nesting areas, photoperiod (longer daylight), the sound and sight of other birds (especially pairs), sexual stimulation while petting etc. Sometimes we never figure out why they start laying. I would leave the egg in, and allow her to lay a full clutch. If you keep on removing the eggs as she lays them, she might continue laying egg after egg, and so exhaust her body reserves (they CAN count, you know). To stop the laying you can try removing any nesting material and nesting areas, provide no stimulation to the abdomen, rump and under the wings when petting her, convert from seeds to a pelleted diet, and increase the photoperiod by 2-4 hours (ie ensure her cage is dark for 2-4 hours longer than it is now). If she turns into a pathological egg layer - ie lays continuously - you may want to try a hormone injection that will suppress it.
Dr Willemien van Wyk
Bird and exotic animal veterinarian
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