Great thread. I have been dealing with the heat as well, or should I say my flock. I do sprinkle the run with water once a day, and it seesm to help, they have a fairly large kiddie pool that I fill with water, only my white leghorn have actually walked in it, but they all drink from it. I also have two other waterers through out the run. They get the watermelon rinds, that I freeze as we eat them, sometimes I give them frozen veggies as a treat.
As far as a mister, where should I try to locate one of those? Do you leave them on all day long or turn them on as needed? I have a huge fan mounted into my coop, and my coop is all open air (see my page), it makes for airy but if 105+ in shade how does it matter..? One of my Roos (avatar) actually came down with pneumonia last week, so I moved him indoors for three days and medicated with Tylan, he is swell now though. Pneumonia in this d--n heat? oh well..