For about 18 years I have used automatic waterers. These can be purchased as "livestock" or doggie water dishes. Hook them to a high pressure strength water hose connected to the faucet and turn the faucet on. The float in the pan keeps water in the pan at all times. I try to get out there once a day to swish it out with a commode brush and empty it and allow it to refill. Since I am frequently out of town for two or three days at a time, this ensures clean, fresh water for them. They drink the most when I empty the dish into the dirt...the water in the dirt, not the clean stuff! Never had a sick chicken ... knock on wood. If I got bad eggs from them, I never knew it 'cause nobody ever got sick from eating them.