Yes, I know the title of this post initially sounds like a bad idea and there are people out there that won't even feed their chickens municipal water (because it's chlorinated). I try and have a balanced view of caring for my flock's health but not going overboard when it comes to treating them like coddled pets....that being said.... I just got a couple 50g barrels that were originally used for pool chlorine. I'm converting them to rain barrels and obviously flushing them VERY well (tops are sealed so I basically flush them continuiously with water for hours until the water coming out doesn't smell like chlorine anymore). I clean them well enough that I feel OK about watering my vegetable garden with the result. Next summer when I set them up, I'd like to use them as a source for my chicken water. It would be rain water coming from a shingled roof, so that may be a double whammy. Whatta ya think? Am I gonna kill my cluckers? I'd love to hear some balanced input on this...thanks!