I'm attepting to hatch chicken, guinea fowl and turkey eggs in the same incubator. I realize they all have different hatching dates, etc. They've been in there since the 14th, I think. I think I've located the source of the smell to be one of the turkey eggs. When candled - there is a large dark mass inside. It got dark before the other turkey eggs did. One of the three turkey eggs looks to be a blank. Should I toss the turkey egg with the odor? It's not a good smell - but I don't know if any smells are normal???