I use coffee chaff as bedding in my coop and it is very light and fluffy so keeping the water clean can be a problem. I found the nipple sysytem to really work and I know my chickens are using it. Whenever I let them outside to free range the quickly go to the nearest puddle of water and gulp it down as if they haven't had any water for days! I have been giving them bowls of water outside the coop just in case but I am curious if they don't really like the nipple system. Does anyone have any ideas?