My guineas definitely do not like the wind.I hav't seen any -30s like R2elk has since I've had guineas but there have been plenty of -10's and some -20's that my guineas have seen and I'm amazed how well they do in that weather. I do put plexi glass on the windows and have caulked and foamed all the cracks in my uninsulated coop so there are no drafts. They do go out if the sun is shining even in minus weather(if there isn't to much wind), but i find guineas are like humans. They don't like the cold weather in the beginning of cold season but when spring comes around that 40 degree weather you were bemoaning in October feels awesome in March.![]()