I, too, have a fan running in my coop. I also have the frozen water bottle inside their waterer. Plus the several inches of shavings on the floor. When I walk inside the coop you can feel a large drop in temp. Although, the hens who are setting are panting, most of the hens go inside when they get too hot. But my coop happens to be two rooms of the old house (over a hundred years old) on the property so it has lots of ventilation and my dh did insulate the north walls of the two rooms so I am sure that helps a bunch. I just sprayed water up into the trees that the turkeys, geese and ducks sit under during the daytime...yes, they freaked out (go figure that one out as the turkey stand in the waterers to cool off and the rest get into the pool and waterers when too hot) but then they run back under the trees and let the cool water drip down on them. I have heard of people turning sprinklers on and the poultry enjoying the water that way but mine would think I was trying to kill them.
