Wait so how do eggs become chicks? Aren't eggs just like unmade chicks or something?

Sorry Manders. The rooster must add his seaman to the ovum before it is laid to get a fertilized egg. Eggs all look the same to the Human eye and must be opened and examined with a microscope to determine if or not it is fertile.

After an egg is laid, a rooster has to fertilize the egg for it to develop into a chick.

the eggs you buy in the store are usually unfertilized