I never thought of putting frozen water bottles right into the waterers. That is a heck of an idea! I will have to get a few frozen tonight. Thank you. I have been doing what I can for the birds..changing the water a few times a day,shade, a fan on them. To say this heat has been brutal is an understatement.Man, that really sucks. I went out early in the afternoon, put frozen 20 oz bottles in all the waterers, hosed down the pens, misted the crap out of everything for a while, trees, coops, hidey holes... Everyone ran like hell, but then they all settlled in under the bushes, coop... All are good.