Any hole I cut is going to let some sun in, because the sun's everywhere, here. This is what I have set in stone for now as far as what I'm going to cut for ventilation, and what I hope the air will do.
That's a good start.
Have you read the two articles linked in my signature? On ventilation and hot climate care?
I see a lot of three sided structures for sheep, goats, with the opening facing away from prevailing winds. I think that could work, but yeah, wind is the main issue here, haha.
A 3-sided shelter is excellent for a warm climate.
It's excellent for chickens in general -- a Woods Coop is a 3-sided shelter adapted for temperate and cold climates.
