Quick question, I'm about 8 days into my 1st incubation ever. I got shipped eggs and have been tossing the eggs that were obviously duds. But I've got a couple that I'm unsure about and I'm not sure what to do or how long I can leave them before they explode and contaminate my others? Or what should I most definitely be seeing by now? Any good pics of what I should be looking at and what's definitely not good? And the ones that the air sac looks to be moving around, those are no good right?