I always push for the most space possible. However, space tolerences are definitely flexible seasonally. Spring/Summer/Fall, if I had enough roost space, I could keep 3x as many birds in my main coop that I currently do (I have 10 birds in a 7x12 coop). They're literally never inside except to lay an egg or to roost. But between short days and cold weather, my birds spend a LOT more time inside in winter time...and they're a lot grouchier with one another. That's with the pop door opened every morning at first light.
Only you know your winters, how much snow you get, and how your chickens react when you get snow. I would always opt for more space if I had the choice, whether that meant decreasing my bird population or increasing my coops/coop space.
Only you know your winters, how much snow you get, and how your chickens react when you get snow. I would always opt for more space if I had the choice, whether that meant decreasing my bird population or increasing my coops/coop space.