I'm in the process of building a coop. It will be 8x16, with an 8x10 coop and 8x6 storage area. Additionally, there will be a 16x16 run. Although i will start small, ultimately I'd like to have around 10-12 layers plus a few meat birds. My questions are: most coop/run pics i see on here have the run completely fenced in, even on top. I am planning on putting up a 5' fence, with galvanized hardware cloth buried a foot below ground to discourage digging predators. Do i need a fenced in top area? Also - I'm planning on a diy pvc waterer with chichen nipples (heated in winter). Is there an advantage for keeping food/water either in or out of the coop? Thanks in advance for the help!