If anyone out there decides to get chickens (not for din-din but as pets) make sure your locality allows it. Even some semi-rural towns have a ban on 'barnyard' animals. Some may allow hens, but not roosters.

They must have a safe place to stay in at night. That usually means getting or building a coop. There are so many different kinds to choose from.

They can be fancy or plain or made out of wooden crates. I've even seen a plastic doggie igloo being used!

On the left is a fine one for three or four hens hens.  Notice it is high off the ground. The ramp is attached underneath so they can go in for the night. Most likely, this coop is in an enclosed yard.
            
The one on the right is good for a hen or two because they have the run of the coop and they are in protected enclosure. This setup is small enough to move around your property. Whatever type you choose, it must be safe from predators at all times.