This is your thread, and it's in the right section.
Just just asking @ThisoldNHhen to start a new thread to avoid confusion with yours and for forum etiquette.
I stuffed my upper open eaves with furnace filters to keep snow on lower roof from blowing in, can slow down air movement pretty well too.
https://www.backyardchickens.com/articles/ventilation-baffling.75434/
Here's how to add your general geographical location to your profile.
It's easy to do...