Ah OK...I figured my vision of the heights might be skewed by the pic angles.
I do see foam inserts at the ends of the clear panels, which would close off any ventilation there.
Ventilation is key, IMO, to chicken heath as their respiratory system is delicate (see the link in my signature...
Nice.... I like the black and white.
When you reinstall the nests I'd put them lower than shown here, you want them a good foot lower than the roosts.....
......so they won't sleep, and poop, in the nests.
I'd want more ventilation also....handy as y'all are.....I'd suggest putting 1/2"...