I give my chickens a water pan that they can stand in and it works great. My easter egger, May, especially likes it. They even like to get in it when it's not that hot.We run our hose water in their pen a couple of times a day. Our New Hampshire Reds love drinking the cool water and walking in it. I was thinking about putting a small pool in their yard with a couple of inches of water. They are already a year old, do you think they will use it?