I might be confused about what you are confused about so lets start from the beginning. You put the egg in an incubator to hatch it. For the first 25 days it is in the incubator truning. At 25 days you stop turning the egg but it stays in the incubator or is placed in the separate hatcher which is an incubator without turners. Once the egg hatches, you let it dry in the hatcher and them it goes into what ever you are going to brood it in. Usually the brooder has a light source for heat. Brooders can range from a cardboard box to an expensive brooding pen system.