I strong, STRONGLY suggest you get a poultry exhaust fan.  Look on valleyvet.com  Type in "exhaust fan" and you'll see
Indoor/Outdoor Shutter Barn Fan
- they are made specifically to operate in the terrible conditions of poultry dust and other debris that will choke (and even cause fires, eventually) regular fans.
https://www.valleyvet.com/ct_detail.html?pgguid=D74B298D-3C6F-4287-9F9F-4EA09B8D0A73&gas=exhaust fan
They come in 12", 16", 20" and 24" -- Look at the bottom left on the product page under "Information"  for the blue links to all the specifications including CFM (cubic feet per minute- how much air is moved), and how much energy is used. We went with the 24" for one coop and the 20" for the other- I like to get things that are operating at 1/2 speed and meeting my needs instead of having a machine on "high" the whole time.
All you have to do is cut a square opening and install 4 screws, and plug it in.  Very easy.
Here's what makes it different.  Instead of just putting a fan on your chickens and having the air bounce off the back wall - it sucks the air through the coop and out the other side- creating its own cross-breeze where the fan itself will not.  You can still have a fan on your chickens with this - but the exhaust fan has made a HUGE difference in our coop.
Now- key to this- wherever you choose to put an exhaust fan- you need something porous so the air can be sucked all the way through the coop and out the other side.
We used a security door- the kind you buy at Home Depot to put over a front door - mesh metal to protect against all predators --- or it could be an open window (covered securely with hardware cloth frame, of course) --- just something open enough to allow the fan to effectively suck the hot air out and bring in fresh air.  As the evening cools, the temperature in the coop goes down at a much faster rate than with a fan.
We lost a chicken last year in our coop to heat exhaustion even with 2 fans running full blast- I was up almost all night checking on them - the temperature finally dropped around 3am so I went to bed- but one of my poor little hens must have collapsed after that.
When they're hot like that their hearts and lungs are working over time trying to rid themselves of the heat- then it's hot all day.  Before I found the poultry exhaust fan, I started carrying all of my chickens inside at night (35 of them) to a bathroom so they could cool off and get a break.  We haven't hit 100 yet this year (pacific nw) but we've had multiple 90+ (which is hot for us) days in a row- and between the new poultry fan and a fan in front (on the really hot days) - I've only had to bring a couple of my biggest, heaviest feathered girls in.  Everyone else did so much better.
I hope that's a functional idea- the unfortunate part about predator loss is now they know where to come looking again- and right now your chickens are at risk either way- too hot in the coop or the next meal.  =(   Or have them trash a bathroom, LOL- but I was willing to do that- lots of cleanup.