I am no worried. I had a brood of 6 eggs. The first hatched at 20 days, then another on day 21. On day 22 I had 2 pip, then they died in-shell. I thought it was because the mother had not kept them warm enough. Now I have 3 eggs under another hen (different eggs, different hen) that pipped yesterday afternoon. I KNOW this hen has not left the nest but for a brief walk. They haven't come out of the shell yet, either and I don't know if they're alive or not in there. The first two that died, I opened up and took a look. The first one looked completely healthy, but still had its yolk sac outside the body. The second one looked like a normal healthy chick - no yolk sac visible. It peeped at me for a good 24 hours. What's going on?