air cell issue

Hello hatchers, I am currently on day 16 with a batch of chicken eggs. I candled last night and saw good development and movement in most, but almost every single one had a very small, nonexistent, or abnormally placed air sac. They were shipped, but I let them sit for about 36 hours before...

Hello all! I'm looking for some thoughts, as there is something going on in the air cell of this serama chick and I'm not quite sure what it is?? Take a look at the pic. As you can see, today is hatch day so the air cell is a bit crazy looking, as usual. However, there is a shadowy gray spot...