The old eggs I'm pretty sure are duds. I looked at a bunch of photos of egg candling and ours look like they are "heavily porous" and have large dark ovals in them. I don't know whether that means they have a bacteria problem or whether they are just duds or we handled them improperly. I went out last night and came home to find my husband and daughter had put the new eggs, which we just bought at the Grange and are "garaunteed fertile" in the same spot, basically touching the dud eggs. should I be worried about bacterial contamination?