Hi all, I am a first time incubator with 8 shipped eggs in the incubator right now. We are at day 7. I've good good air cells in all... and for the most part, when candling, that is all I can tell. Two of the eggs are too dark to see into. I can see no veins in any of them; some shadows that might be... something? In two of them. And 1 has a very active little something moving around. So I'm pretty sure that one is viable. But none of them look anything like any of the pictures I've looked at of candled eggs at day 7. On day 4 I broke open one that I was certain was completely clear and dead... and found a very nicely developing embryo. I do *not* want to repeat that error. So, how am I to decide if I need to toss any? Can I just leave them all in for now? I've heard of exploding eggs... yikes. Are there signs to that before it happens? Thanks!