Ooh I like the rooster cutouts! What did you use to cut them with? That's a lot of detail.
I decided to be better safe than sorry, given that everybody is advising for tons of ventilation, so I left the tops of all four of my walls open. We haven't had any snow storms this winter but if one day we do, and it looks like the overhangs aren't enough, I can put top-hinged flaps on them and open them partway, to still allow air in but protect them more from the top.
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