I'm thinking about getting an incubator and purchasing some eggs to hatch. Have done some reading up on it, but still have questions. First, I see posts where people have gotten a new incubator and then refer to using the new one to incubate and the old one to hatch. Don't the eggs hatch in the incubator then the chicks get moved to the brooder? Maybe someone can explain it to me. Second, I'm concerned about bringing disease into my flock. Are chicken diseases carried in the egg? Chicks I have purchased previously have been vaccinated for Marek's disease. So if you hatch eggs do you need to vaccinate the chicks yourself? Any thing else you need to provide for the chicks you hatch as opposed to purchased chicks?