We have built a 8x8 hen house with an open play area upstairs for the children. The Run is 16x16 and will be covered with fencing. How many chickens can I have in these areas and maintain a healthy space? I want it to be a happy area for the chicken, not over crowded. The hatchery I ordered form had a min order of 16. Also, how far apart do I need to space the roosting bars? Thanks for your help. WILLKATDAWSON Edited: Retyped in small case.