For folks that live where it is legal to collect rain water. Video instructions that walks you through a diy 220 gallon multiple barrel system. You could set up one to catch the rain from the house and a single barrel on the chicken coop to use to water the chickens.
The nice thing about this system is there is one inlet and one 1 hose connection to use the water from all four barrels and with this system you can make it as big or as small as you want. 4 barrel, 8 or only one they will all work. Kainanra’s Suburban Homestead shows you how in this video.