Start with a 5 gallon bucket waterer, with the little drinker cups, with a big chunk of ice. I use a rubber wear container, fill it with water, freeze it and then put it in their bucket. Also I have one of those small totes. I put bricks with ice and it keeps them cool. It's like an ice bath for their feet. They'll stand on the bricks to keep cool. Also I put vegetables in a block of ice and put it on the tote lid and let them Peck at it all day. Chickens use their feet to cool off. My girls also like lettuce. I have a container that I hang it in and they eat off of it all day long.