I kind of wish it was 90 here! It was rainy, windy and 50-60 here yesterday-----really nasty! Anyway, what I did on the hottest days this summer was to run a sprinkler in the free-range pen during the daytime. Some of the chickens actually liked it. Of course, my free-range pen is about 10,000 sq feet, so they had plenty of room to move away from the sprinkler.