You are 100% correct about needing ventilation and the negative effects of humidity. My coop has plenty of ventilation. It's attached to the garage with a a thick blanket as a door. I sealed the cracks that were producing drafts. I have Silkies, and tI find that hey do better when the coop temp hovers around 32 degrees. It's totally dry, I pick up the droppings daily. It is very clean. In 15 years my chickens have never had worms. I had poultry lice once many years ago.
This is just what I do. I love Silkies but they are more fragile, and when these pass, if I ever get more, I have thought that cold hardy breeds would be easier.
This is just what I do. I love Silkies but they are more fragile, and when these pass, if I ever get more, I have thought that cold hardy breeds would be easier.