Hi there and welcome over the thread @Brat Flock
yikes!!!!! that hurt!!! $200 bucks!!!!
how far are they coming from?
was that your first hatch?
BCM are hard to loose weight and you need to keep humidity low and I run higher heat on them as well....
do you calibrate thermo/hygros? and you have several?
what can you tell us about how you run?
They came from Arkansas. I bought 6 first for $125. They were clearly marked hold at PO with my # I hatched 4 from those (would have been 5 but I opened the incubator to early and lost humidity and lost one) I ordered a dozen more... She forgot to write the hold instructions or my # on the box, it was left on my porch, 1 egg was crushed, 1 was cracked, 9 had rolling air cells and 1 had a very deep saddle air cell. So I expected to loose them all. At $200 a dozen I at least wanted to try LOL
I ran the incubator at 100- 100.5 at 25-30% humidity and bumped it up to 55-60% during lockdown. I have 2 Genesis 1588 one with a turner, one for lockdown with a separate temp/humidity gauge (besides the one built in)