I just finished painting my coop and will soon begin building my run. Do my chickens need a roosting bar in the coop? How about the run? If there is one in the coop how high off the floor should it be. I will have 4 chickens. I am getting a welsummer, australorp, easter egger, and a meyer mealmaker. I am planning to use a 2x4 for the roosting bar if one is need inside the coop. Thanks for the help.