Checked my eggs tonight. I'm on day 12 and one went bad. Took some pictures so maybe someone can tell me what they think happened. Of the remaining 9, I could see 7 of them had veining and 3 of them were moving when I was candling. The other 2 are dark brown eggs so I had a hard time seeing anything other than darkness.
Here's the one that didn't make it.


Here's the one that didn't make it.