Shade's not a problem here; coop & run are under a big Maple, & the run's tarped. That 50% hatch rate bothers me, thoughMy pens are half under roof, so as long as they had shade, they were fine.
I found the eggs much harder to hatch. I usually hatch 90% or better, but my first 2 BCM hatches were 50%, and they were my own eggs. I finally got up to 75 and 80% by running dry for the first 18 days. Dry for me was 28-30% humidity with no water in the channels
Thanks