I put some shipped eggs into incubator on Saturday. I candled as I put them in to check for airsacs, cracks, porous shells etc. most looked ok. I just candled again tonight (day 4) not expecting to see much, but can see veins starting in at least 3/12. However, one brahma egg did not seem to have an airsac at all on Saturday ( is this even possible? I thought maybe it was detached and that was why I wasn't seeing it). Tonight the egg is completely dark... Almost like a 19 day egg, but without the airsac. What does this mean is going on inside? Should I take it out before it causes trouble?