I just went to the feed store, and bought yet another 5 gallon plastic waterer for chickens. It was about 34 bucks. My friend showed me tonight, that she uses the little one gallon dog waterers (the ones with a little carboy a dish at the bottom) I have a larger 5 gallon carboy style waterer for my dogs in the house, but can't remember what those cost. Has anyone used these? Do they work okay for chickens? They are certainly easier to clean and fill! The plastic chicken ones are such a pain to scrub out since they are octagon shaped inside, and have way too many corners that want to grow things. Not to mention the gaskets always need replacing, the little caps always get lost, and the lids have to be on "just right" or the darn things leak. If you have used the dog style ones in your coop, please let me know how they worked for you.