I had 36 eggs in the incubator; 7 out of 8 BCMs hatched, 7 out of 8 Ameraucanas hatched (shipped), 8 out of 11 EEs hatched, but only 2 out of 9 sex links hatched; one from a red sex link and one from a black sex link. I opened the unhatched eggs and there were fully formed chicks inside all but one of the eggs. One pipped but didn't make it out. Same roos for the EEs and the sex links. I have noticed that their light brown shells seemed to be thinner than the EEs, Ameraucanas, and BCMs. Is it possible they drowned? My humidity was at the levels recommended by Hovabator throughout the hatch (mid-50s before lockdown, up to 80% during lockdown/hatching). I hatched in egg cartons.