Is the soffit material perforated? Even if it is, it might be worth replacing soffit material with 1/2" hardware cloth and adding some gable vents....at least in area of shed where coop is...and maybe even add one of those whirly roof vents too.No, they have soffit on them
Good flow from eaves to gable and/or roof vents will carry moist air out of coop.
Chickens generate a lot of moisture from breathing and pooping, best to get it out of coop to help prevent frostbite.
