@MillersFarm I just recently got serama and I do not heat my coop. Right now I have them in the house in quarantine in an unheated bedroom with the window open it is in the high 40's in there. I have been researching heat as I keep getting mixed answers on my research (not uncommon as I had the same issue with my silkies and have seen with my own eyes they do well without heat even in negative temps). I am wondering because we are not all that far from each other and I too get double digits neg temps. Do you add heat lamp or heat panel at all in your coop and how cold does your coop get?