How does one evaluate the ventilation in the coop? I’m aware of the 1 square foot minimum of vent/window per bird rule, but what about a funky layout? I have a staggered, two-story coop and really don’t know how to assess whether it’s venting properly. I tend to shut it down more when we get winter storms (which are mild here in California), but this reduces ventilation. Just thinking ahead for this next winter. Thoughts?