I put my thumb print in a shell. Created a pretty big spider crack and it wrapped around the egg too. It was a duck egg and it even pipped where I painted over it and it's alive and thriving.
Also had to paint a wellsummer egg and it hatched and lived until someone bought it and let their dog...
I would let your humidity be a bit lower during incubation. I waited for it to reach 25% before adding more water. What kind of incubator is it? I only fill one tray, the smallest when needing to add humidity for incubation.
I would also give him hard boiled egg yolks. Do you have or can you get poultry nutridrench? I was under the impression they need a higher protein feed than that.
I took a tall plastic container (it had instant coffee in it) and cut a small hole in the side, about an inch up from the bottom. The hole is small enough for their head/beak, but not their bodies. I filled it with pea gravel and then filled it with water til it overflowed out the hole. They...
no, their eggs seem so small they right themselves when knocked over. I didn't have a problem. I did sometimes rearrange the unmatched eggs to be all together in a group, but the chicks like to lay on top of the hatching eggs...practicing maybe lol
I put fermented feed in with the Littles and a small container with a small square cut out towards the bottom on the side. I fill it with marbles, then put water in. The marbles prevent them from drowning by preventing them from climbing inside the hole.
I keep them in the incubator this way...
https://sites.google.com/a/poultrypedia.com/poultrypedia/poultry-podiatry
I think your temperature is getting too high (splay leg and crooked feet). I'm having the same problems with some ducks I just hatched and my a/c broke during incubation, so it got HOT up there.