They might need a perch 6-8" in front of upper nests to land on before entering nests.
Put sharply angled board(s) on top of nests to keep them from roosting there, it's higher than roosts and they often prefer that.
Actually the 'green eyed' is referencing my jealousy for your green colored building.
Have you ever heard the phrase 'green eyed monster'?
Time will tell what you need to manage the chooks in the heat, they are pretty vulnerable to overheating.
But you have an advantage in your low...
Oooooo, what a great building!
Love the door/ramp!
Might want to put a few cleats on it for traction.
Gable vent looks pretty good...did you do both ends?
Agrees that blocking roosting access to the truss bottoms might be a good idea.
I'd be tempted to tack some foam boards on them or the...