40 Black copper Marans are on day 22. I have one chick and 2 external pips that quit. I held the humidity at 35-40 and the temp held well at 99.5 never dropping under 99 or going over 100. At lockdown I raised the humidity to 65 with a couple spikes to 70. I am using a foam gator with a fan. Any suggestions...hard to reframe from assisting at this point. I did not candle because it was to hard to see in the dark eggs.
Not an expert on them but I have heard their shells are harder. Is there a Marans thread?