I candled at day 6, 12, and 18, I think. My silkie was really good with letting me run off with her eggs for a bit.Just checking, with eggs under a broody hen, what is the best time to candle eggs before they explode? Like if some aren't fertile how long do I have before they go rotten /explode? Do I have 2 weeks or should I candle earlier to make sure?
By 6, you should be able to see what's a dud and by 12, you should know what needs to be cleared out.