I'm really feeling down tonight. After losing two of our NYD chicks to the dog yesterday, I was hoping for some good news candling tonight. Well, I did not get it. A couple days ago, I did a quick candle and saw development in only 11 out of 30 eggs. Tonight I did my in depth candle to mark air cells and such, and only two of those 11 are definitely alive. 7 of them are most likely quitters (no movement, and veins look to be disintegrating), and 2 had blood rings.
So what are the main possible causes for quitting between days 5 and 7? Other than temps, which seemed fine to me (but I can't be sure because all my temps said something different).