We are redesigning what was a dog run (our dogs live in the house, but for nice days we had a big run for them...this was before we learned how overrun this property is with ticks), and it had shade cloth over the top of one end. But the more we read about turkeys needing to keep cool, the more concerned Alex got. So now he's just gone whole hog and has put in 14-foot (16-foot, but sunk 2 feet in the ground) 4x4s and will build a sloped roof of corrugated sheet metal over one end of the turkey yard.
I hope we're doing the right thing. We're not building an "airtight" coop at all for the turkeys, because we see how hot our chickens are--we can't even shut their coop up at night, have to leave the doors and windows open. The next chicken coop will have LOTS of ventilation!