I am the proud new chicken mama to 6 pullets: 3 Barred Rocks and 3 Americauanas. We brought them home on May 1, 2009, at one day old. When they were one week old, the figured out how to empty the water, still not sure how. Placing it on bricks has helped; they can neither tip it over, or easily fill it up with bedding and poop. But, on their 7th day, the first day they managed to empty the water, they went without water for several hours before we noticed, and they all developed dry-looking tummies.