I'm a relatively experienced incubator. Recently my husband made me a smaller homemade incubator to replace my old, gigantic, upright freezer incubator--I didn't like the temperature fluctuations in the old one, and the new one is computer controlled and doesn't fluctuate more than .5 degree +/- . I ran a batch of eggs through it as a test. I set 36 eggs--14 Olive Eggers and 22 Black Ameraucana.
--All hens are the same age
--All hens were covered by the same Black Ameraucana rooster
--All hens lived in the same hen house, ate the same food, and used the same nest boxes
--All eggs were gathered together, blue and brown
--All eggs were stored before hatching in the same paper cartons, pointy end down, mixed in the cartons
--All eggs were set randomly in the turner
--I did have some problems keeping humidity where I wanted it; it was, in general, too low (20-40%) during most of the incubation, although I got it above 70% during lockdown.
I have (so far, eggs have been hatching for 12 hours) a 65% hatch of Olive Egger eggs--pretty darn good for a new incubator on it's test run. All of the Ameraucana eggs died, the vast majority around the same time. Only four developed enough to make it to lockdown, but I don't think they are going to hatch.
Here is where 90% of the Ameraucana eggs died:
Any ideas? I'm befuddled on this one.