I don't really see much movement in the eggs when I do candle. I have noticed the bottom of the egg is getting darker. I saw movement around day 16. After that I haven't really seen any. I did have two eggs that were fertile and developing suddenly take a turn for the worse and the fetuses died (I posted about this) and the eggs went bad. Is it possible that might happen to these? I haven't seen movement in them and from the videos I've seen of eggs at this stage, they move around quite visibly.