There is also misters that can be set up I've never had to use them here but I have seen where people use them for the ducks and chickens. Maybe try putting another pool out too so Kevin can possibly use one or the other.
found this online
Misters are another way chicken keepers cool their flocks. The dry Arizona weather lends itself well to evaporative cooling. A simple, standalone mister that attaches to a garden hose can be purchased for around $12. Set up the mister in a shady area near a water supply. If you choose to set it up inside the coop or run, use caution that it doesn’t soak feed bins or overly saturate the coop floor. A slightly damp floor is cool and refreshing, a sopping wet swamp breeds disease and attracts pests.
A review https://www.backyardchickens.com/threads/water-mister-for-chickens.403559/
found this online
Misters are another way chicken keepers cool their flocks. The dry Arizona weather lends itself well to evaporative cooling. A simple, standalone mister that attaches to a garden hose can be purchased for around $12. Set up the mister in a shady area near a water supply. If you choose to set it up inside the coop or run, use caution that it doesn’t soak feed bins or overly saturate the coop floor. A slightly damp floor is cool and refreshing, a sopping wet swamp breeds disease and attracts pests.
A review https://www.backyardchickens.com/threads/water-mister-for-chickens.403559/