So I am trying to figure out how much of the shed to fence off for the chickens. They will have an outside run too and will be allowed out into my fenced back yard also with supervision only though. How many chickens should I keep in an area 48 inches by 93 inches. It is regular shed hight 6 ft or something with rafters. Also should I fence them out of the rafters? I am trying to figure out if I need to fence off more but this area looks big enough to me?