as some of you know, I built a new incubator to replace the Hova after a temp spike. You can see it here: https://www.backyardchickens.com/forum/viewtopic.php?id=166892 Last sat was hatch day and of 12 Barnevelders and 6 Lemon cochins only 2 barnevelders hatched. I've opened the eggs and 3 of the cochins were between one and three days of hatch and all of them had green in their yolks, one had white spidery stuff. Of the Barnevelders 5 were between one and three days of hatch. No green gunk. Two were all but hatched. Can anyone shed light on what would cause this? There is alot of air movement in the bator and two one inch holes. One brings air in and one out. Humidity was 70% most of the time with a drop down to 65% for just a little while. Perhaps the humidity was too high for this type of incubator? I have another hatch that will be on day 18 tomorrow, so I am trying to see what ya'll think.