My husband is currently interviewing around the country for medical residency. We currently live in Texas (both raised here and used to our crazy, mostly HOT, weather). A few programs he's considering are up north, and a couple in the midwest. He most recently is considering one in Minnesota. Of course, I'm in a panic because I wonder what my poor chickens will do in winters none of us are prepared for. I have two buffs, a black sex link, and a barred rock. I'm assuming my buffs would be ok for harder winters but what about the other two??? I'm afraid I haven't done much research yet in the area but am just throwing it out there. They are used to free ranging here all year round. The welfare of my chickens is a huge factor in our move so any info helps. My husband built a nice predator proof, insulated coop here. Is there anything in particular he would need to consider when building another coop where winters are rough? Ty in advance.