I have a broody and she's about 10 days sitting on her egg. I have been giving her food and water every day .I have some nice eggs in the mail should be here any today. how should I Switch the old eggs for the new eggs. Should I put the other eggs in the incubator they're not purebreds they're all mixes what I'm receiving today are purebreds that I really really want to hatch. Any help is appreciated I've never done this before I have only incubated eggs with moderate success