I currently building my chicken coop (8x12) for my lovely little black orpington cuties... the debate I'm stuck in is what size run I would need for 20-25 chickens... I plan on all orpingtons and a couple of silkies, so how tall does fencing need to be? (I found some 7ft tall rabbit/chicken red brand fencing pretty 'cheap' online...) I would free range, but the neighbor's nasty boxer would probably have a nice chicken dinner... not to mention I've got a road next to me... I want my chickens happy and healthy... the plan I've had so far was an 80'x80' run. I was hoping they wouldn't destroy all the grass at that size... Ideas??