Here's a photo of the pans I use. They are called Hog Pans at Tractor Supply Store. I just fill them with water about halfway (no deeper than 2 inches) and either throw in ice or a frozen water bottle. I love the Hog Pans because they are shallow, so more likely for them to step inside and easy to dump and re-fill (they do tend to poop in the water!). Also they don't tip over if I even have them filled less than halfway with water. The chickens love even standing on the edge. I have two and place them in shady spots. I guess if you have lots of chickens, you might need something bigger or more pans. The photo below includes the first egg my Easter Egger laid - right in the water pan - I guess it caught her by surprise stepping into something cool in the 100+ degree heat! She now lays her eggs in the nest box like a good girl!
