Sorry to hear about your lost poults. I, too, have had a really rough time in the past with poults, but I am trying again. Last time I incubated I had 13 turks and 6 chickens in my HovaBator1588 - all the chicks hatched and only 1 poult made it out. The dead turk eggs were fully formed but did not pip out. The lone survivor slowly withered away and died - in spite of having the chicks as role models.
This time I lowered temp in my incubator (preset was over 100 deg and I went down to 99.7 for incubation) and with 4 days to go I have 24 of 37 turk eggs developed and a few chick eggs in with them again. Have some wild cross to Red Bourbon eggs in there. I just think the heritage breeds and wilds have not been genetically selected for raising by hobbyists or mass raising in commercial ag manner, so they are more dependent on having a hen teach/care for them.. which makes it challenging when we take the hen out of the equation. Just a theory. They certainly are challenging and I will really feel I have accomplished something to raise a hatch and have them survive.
Thank you again to all the wonderful people who share info here and help others.