Actually, I HAVE seen perfectly good eggs die when adjacent to bad, decomposing eggs. Whether it was from bacterial cross-contamination via the egg walls or perhaps alcohol or some other chemical byproduct cultivated by fermentation, there is no doubt in my mind that these good eggs were compromised and killed by the decomposing eggs adjacent to them. This is NOT to say that every adjacent egg would be killed. I have also seen good eggs remain good when adjacent to a bad egg, but why even take a small chance? In my experience if there are no veins the eggs are NOT good. But as a solution one can always put the dubious eggs into a seperate section or seperate box so they can easily be removed and thrown away when they turn green in 2 or 3 weeks.
The few times I was forced to allow bad eggs to incubate next to good eggs was when a female layed off-schedule and I found her wrapped around a large clump of eggs that had already dried together. I was forced to place the clump of eggs into the incubator intact with bad eggs in the middle. It's never adviseable to try to seperate the eggs once they are "glued" together.
While I do not like to publicly disagree with fellow breeders/keepers with your many years of experience I felt it was my responsibility to the other up and coming breeders to put in my thoughts on this matter. I hope you take no direct offense. I do respect your experience and knowledge gleaned from decades of keeping these guys.
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David Beauchemin
High End Herps.Inc
http://HighEndHerps.com