Ok, so I went to check my bator (as I do a hundred times a day to make sure the temp is good) and I notice this egg: There's no mess, a slight ring in the turner's cup and no real bad smell... The crack and separation went all the way around the egg. When I started to peel it you could start to smell it, but it wasn't a normal rotten egg smell. It was as gross, just not the same. When I started peeling the membrane back I ended up with a bowl full of think yolk. No blood, no development at all. Just a thick smelly yolky egg with a small amount of white. Now my temp has been holding pretty good. (I have 3 thermometers in there for accuracy.) I haven't had any major fluctuations. According to the meter my humidity is 45-50 (I won't vouch for it's accuracy, but I am keeping an eye on the air cells and they look pretty good to me.) The majority of developing eggs in there also look well to me. I'm just curious as to what happened with this one. I'm starting to doubt my ability to hatch eggs here.