I had chicken, quail and ducks all in the incubator set to hatch Thursday. The lone chicken egg hatched Tuesday morning. We had 8 cortunix quail hatch Friday night. The duck egg rocked like crazy for awhile Wednesday but nothing since. I took the duck egg today (after seeing no movement) and a quail egg that had pipped (you could see the beak sticking out of the egg but it had stopped breathing) and opened them up. The duck I believe died several days ago, it was shrink wrapped and the yolk hadn't been absorbed much into the body. The quail however I have no idea what happened. It was perfectly formed and had pecked through the inner membrane and the shell and then just died. Now, the chick and most of the quail had no issues popping right out of their shells, any ideas why the duck got shrink wrapped and what might have happened to the quail? I kept the humidity around 35% during incubation and then up to 55% for the lockdown, the temp was 99.5. I did notice that the membrane on the quail was very hard to rip through. Oh, if it makes a difference, all the eggs were set on their sides and hand turned. *I know I probably should have waited a bit longer but after 12 hours with no movement in any of the remaining eggs I figured it was safe to check those two out. I am insatiably curious and want to learn all I can.