I’ve had one bad hatch in mine, setting was 100 F and actual temps in egg slots were 98.8-100.9 F so an average close to the ideal 99.5 F. The two that hatched did so at the beginning of Day 20, plus eggtopsy on day 21 showed dead a chicks in beak over wing malposition, which can be a sign of heat stress. So, I think my temps were too high, even though some slots (nest air intake, I think) have temps quite low. I’m wondering if having the incubator full would even out those hot /cold spots..Lowered the temperature 1 degree. I ran it at 98 instead of 99... likely a calibration issue. I also stopped making mistakes like opening to remove a few chicks to stop them from kicking around hatching eggs. Turns out they do fine rolling around but they do not do so fine when they are shrink wrapped. I also kept the humidity very low before lockdown, let it run dry the first 3 days, put in a little water , let it run dry and wait 3 days before filling it. Then when they hatch I add a soaking wet sponge as well as filling all water chambers. That may or may not work for you. I hear other people doing completely different things with their hovabator and having more success than I do.


I waited until the end of day 21 to try to help with my last hatch, when the two that lives hatched at the beginning of day 20. All were beyond my help by then...
I say this just because I wonder if I could have saved a few if I’d intervened sooner, like 24 hr after the healthy ones hatched instead of 48 hr...

