(ironically 2 of my chickens are named Crispy & Nugget), so I got on here and brainstormed about things to do to keep them cool: in the third pic they are eating frozen fruit ice cubes 
I have the advantage of coming home for lunch. I let the chickens out all 70 of them and place a frozen 2 liter recycled soda bottle full of ice in a water dish that is deep enough to float. The second bottle in the middle nest box and the third bottle behind a fan to blow cool air into the coop . The fan has a thermostat that the switch turns fan on when the temp goes above 85. The last bottle is against the automatic bowl water to keep water cool. I have a mist system in the sheep pen I turn on by their trough and the chicken love that area, it has a cover over the trough too. Lotsa shade. At dusk I collect all the bottles and put back in freezer . I have about 12 bottles to rotate.
In Southern California it gets into 3 digit temps. I drop in small bottles of frozen water into their large self-waterers each morning to keep their water cool, replacing in afternoon as needed. In the heat of the afternoon hours they are supplied with cool, refreshing watermelon, white grapes, berries, etc. I have a mister that they absolutely "flock" too. In the early morning when I am cleaning the coop and refilling feed and water, I dampen the dirt floor slightly with a hose. I also have heat-resistant tarps attached, that can be lowered or raised on all sides of coop, depending where the sun is blazing at any particular time of day. Finally, I have two circulating fans to help distribute heat and mugginess out of the coop/run.
try those plastic coasters and sleds that kids use in the winter
For water dishes that my chickens can stand in as well as drink out of is, new kitty litter boxes. I buy the smaller shallow ones. They work perfect.
The sleds are an excellent idea!
I put a fan outside the screen door of the coop, turned it on and medium and all 4 pullets lay down in front of it, and hours later they have not moved
