Today is day 3, so it is kind of early to tell and I'm not discarding any yet, even the one I saw nothing and think is not fertile. In some I saw a small spot and it seemed to move or swim even after I held the egg still for a few seconds. Is that normal? These are green and light brown eggs. I will check again at day 5 or 6. I have one big egg that is a duck or a goose egg (not sure, got it from a neighbor) it had a large spot that looked more like some of the candling photos I've seen for day 5 or so. Any input is appreciated!