There is a cold spell of weather coming according the experts which means the water will more than likely be frozen for most of the day!

Be sure that you birds have access to liquid water at all times during the day!

Also be aware that the freezing weather may cause frost bite to the combs of your chickens, particulary the large combs of roosters, which is not a good thing if you intend to show the bird this spring.
I suggest some vaseline on the combs to prevent this.