How soon should you remove an egg that is not being sat on?

For chicken eggs:

* Unfertilized eggs: These are the kind you get at the grocery store. You can store them in the refrigerator for 3-5 weeks after the "sell-by" date.

* Fertilized eggs: If a hen has sat on an egg and it hasn't hatched, it's likely no longer viable. You can remove it after a few days if you haven't seen any signs of life.

For other bird eggs:

* Fertilized eggs: The incubation period varies depending on the species. You should consult a guide for the specific bird you have. Generally, if the egg is not developing, it's best to remove it after a few days.

Important note: Removing an egg from a bird's nest can stress the bird and cause her to abandon the rest of her eggs. If you find an egg that is not being sat on, it's best to leave it alone unless it's clearly abandoned.