I went into the barn last night to candle my eggs. I found one rotten and one infertile. The rest had a black mass inside (no movement could be seen). We are about 11-12 days. My question is that when I candled the eggs, about 9 out of 12 of the eggs, the mass was on the side of the egg an not in the end. All of the pictures I have seen showed the chick at one end of the egg with the air sac on the other. There was an air sac in all of them, but on those, again it wasn't at an end, but on the side longways. Does this make sense? Are my chicks ok?