I haven't come across this before, so I'm curious if you have. I have 7 eggs in my incubator, all placed at the exact same time. 4 are lavender ameraucanas (though their father is slightly suspect, so they could be a mix), and three are BCM. They are 10 days along now. All four of the lavs seem to look perfect when I candle them- lots of movement, and they seem to be exactly as developed as I expected. All of the BCM seem to be much smaller- they look like they're only 6 or so days along. I saw movement in all three, but frankly, one didn't look quite right, and I think there was a bacterial ring. I expect that one to die in the next day or two. But, what about the other two? Did I just see it wrong?