I think I grasp what you've done. You cut squares in ceiling and covered with hard wire to vent out the floating roof line.
Now what happens is North wind pushes into the high end of roof line and down those openings in the ceiling. Now you are closing off some of the ceiling openings.
You should limiting the wind access to the roof. Looks like you have a long overhang. Plywood that to two inches to your fascia board. That two inch opening is far more than you even need.
The gig with frostbite is your birds with largest combs will get tips of comb frosted in cold weather. If you are experiencing it now in November then you obviously need to fix your venting set up.
Now what happens is North wind pushes into the high end of roof line and down those openings in the ceiling. Now you are closing off some of the ceiling openings.
You should limiting the wind access to the roof. Looks like you have a long overhang. Plywood that to two inches to your fascia board. That two inch opening is far more than you even need.
The gig with frostbite is your birds with largest combs will get tips of comb frosted in cold weather. If you are experiencing it now in November then you obviously need to fix your venting set up.