>Chicken eggs are not fertilized. This is a common misconception. Chicken eggs do not immediately begin to develop when fertilized. They have to be incubated (heated) to start the development process. Most commercially produced eggs are not fertilized, but a lot of them are. Some egg producers think having roosters around increases egg production, and from my experience I concur. Here at the Sunshine Ranch all of the eggs we eat are fertilized. I have a friend who has even hatched eggs from the supermarket, including Leghorns from large commercial producers. You just need to check to see if they are fertilized before trying to incubate them. There is a little white thing on the yolk. If it looks like a blob or booger, the egg is not fertilized. If it looks like a perfect doughnut, the egg is fertilized. This explains it fairly well: https://www.fresheggsdaily.blog/2015/02/are-my-chicken-eggs-fertile.html