I just candled my eggs! The 28 I put in on the 2nd are doing great. I have 3 I think bad eggs, and 3 quitters. 22 that look good.. The ones I put in last Saturday have only 5 days on them so much harder to tell. One is bad for sure, maybe. The yolk appears to be on the top of the egg where the air sac should be. I am guessing bad and about half have blood vessel in them, BUT it is real early. I put 13 in on Saturday. Being a complete chicken I left them all in.. I thought the cold might have taken a worse toll on the eggs, but maybe I got lucky.