I've hatched a lot of eggs but this is a new problem for me. Started with 20 eggs but 8 were clear or early quitters. The 12 that made it to lockdown looked good but they are mostly welsummer and marans eggs so kind of hard to see much. Day 20, 1 hatched. Day 21, 2 more hatched after being pipped for over 24 hrs. Day 22, 3 more hatched, one had a lot of trouble and I ended up helping it. Day 23, one more hatched but it took a long time. I candled the 5 remaining eggs and didn't see any movement but left them in overnight. Today is Day 24 and I took the eggs out and opened them. They were all completely formed, yolk absorbed, 2 had pipped the internal membrane but not the shell. One was still alive. Eeek! I had chipped off the shell from the air sack and tore the membrane a little and it started bleeding, then saw the chick moving. I quickly stuck it back in the incubator but don't think it will make it. What would have caused so many to die just before hatching? They were in a little giant until lockdown then put in a brinsea 20 to hatch. We have more eggs that need to go into the brinsea for lockdown tomorrow and I'm hoping for a better outcome.