I've been reading about winter wind breaks, coop/run orientation and wind directions, and I just wanted to point out that it really helps if you look up the predominant wind direction where you live, because that varies. I found a very patronizing-sounding thread where somebody was talking at length about how important orientation is, how south is the best direction for everything, etc. etc. but in reality, not everybody gets their worst winds from the north. This varies greatly within the US, not to mention that this forum has members all over the world, and I imagine things are quite different in Australia, for example. So I looked up the average wind direction in Boston where I live, and it turns out that most of our wind comes from the west, year round, but especially in the winter. And our least windy direction is east, so I'll probably cover 3 sides completely, like Alaskan suggested, and leave one side fully open, but now that I know this, I'll leave the east side open, not the south side.