Hi! I have modified a Chick N Barn for my 3 hens like the example shown in the Coop Pictures and it works great for my small flock. I wonder, though, if I should/could do any winterizing. I live in Bend, Oregon - a zone 5b, I think. We get snow and winter overnight temps down to about -15 or so. I'm not sure how I would add insulation other than to staple something to the outside of the coop? Any thought or suggestions? My coop alongside my alley and it isn't really practical or feasible to run electricity out there safely, so they have no added heat. Last winter they did OK - I did barricade them inside the coop on really cold days and put vaseline on their combs, but that's about it. I'm worried though about this winter as they seem skinnier, but perhaps that's because they are molting? Thanks!