I built my birds, what I thought was a nice roost. I noticed them all fighting for the top bar, which I kind of expected. It dawned on me, I could run diagonal bars across the corners of the coop, giving them all adequate space to be at the same high level. They only seem to want to use the bar on one corner, and top bar on original roost, I shunning the other diagonal. The only theory I can come up with, is the one they prefer is open visibly to one side, where the other is on a corner wall.. What's up with this?