Simple as that. We all know they say if an egg floats it means its bad. Well, I had four dozen eggs in the fridge, decided to make sure they all were good before pawning them off on someone. Almost ALL of the eggs ended butt end up. Which I won't give to anyone because I don't want anyone to get sick. So... do fertilized eggs float? I have a rooster, and he definitely does his job, so just a thought.