Do you have a male bird in the cage with her? If you only have the one bird, then the egg can’t be fertile. If you do have a male with her, how old are the birds? If they aren’t two years old, they should not be in the same cage. You said young parakeet, so it sounds like she is probably too young to be laying eggs. If there is a male, and both birds are not 2 years old, then it would be best to separate them until both birds are old enough to breed. If you decide to let them breed when they are old enough, then they need a real nest box – not a nest on the cage floor. If she is by herself, take away the nest and the egg. A single bird should not be given a nest or be allowed to build one. It’s very hard on a female to develop and lay eggs. So if she isn’t with a male, there is no need for her to lay eggs. Some single female birds can start laying eggs and just keep laying eggs over and over until it kills them. There are some changes you need to make to try to keep her from laying eggs again.
Limit her light to 8-10 hours by covering the cage early each evening
Do not give her anything to use as a nest – no bird huts or tents, no box, bowl, etc. If she decides to sit in a food bowl, remove it and replace with smaller cups.
Do not give her anything to shred such as paper or cardboard.
Rearrange the toys in the cage.
Move the cage to a different place in the room. Move the cage about once a week, or whenever she shows signs of nesting.
If she is let out of the cage, do not let her get in any dark cozy places.
When you handle her, limit any petting to her head and neck – do not pet her on the body.
If there is no metal floor grate, then do not use any bedding or paper in the cage tray – leave it bare and clean it daily.
If she continues to lay eggs anyway, then you may have to take her to an Avian Vet for a hormone implant or shot. The implant seems to be more effective and lasts longer.
Thank you for asking Lafeber,