We have 3 waterers in the yard (well, 2 in the yard, 1 in the run) for the chickens, and we go to great lengths to make sure our girls have plenty of fresh, clean water. Sometimes we have to empty it out and refill it before they drink it all, but we are concerned about the health of our flock. For all the good it does us. LOL. Three waterers FILLED with fresh water, and what do they drink? The nasty muddy rain water that accumulated on a plastic bag that the wind blew off the garbage pile and into the yard.