Laying & hatching eggs is part of your bird´s natural life cycle. Even domesticated birds in cages do this. If you would prefer your bird not to lay eggs or if it becomes a problem substitute the real eggs with these plastic dummy eggs. It is not a good idea to simply remove unwanted eggs as the female bird will immediately produce new eggs. This can be very distressing for your bird & increased egg production can lead to signs of deficiency & cause your pet to be egg-bound. A good solution is to replace the real eggs with dummy eggs so that your bird´s natural breeding instinct is not affected. ul> Diameter 1 cm x 2 cm Canaries Diameter 1.8 cm x 2 cm Budgies