Bicoastal
Songster
Wow that’s hot in May! Holy cow hot for mid spring. I suggest a sealed motor fan meant for outdoor use, especially with the dust and dander of fowl.it was 100° inside a few days ago. He's to frame a screen wall/door so I can leave the exterior doors open.
Googling barn fans may give you ideas for placement. Often in horse stalls we place them in the high corner or in front of a grilled window. Maybe high corner above where the screen wall will be, if you think there is enough remaining structure, to pull outside air in.