She did okay for part of it, was always outside and acting like it wasn't too cold like most of my birds do. She was always too light though for my taste and I think her size plus possible heart issues just were too much combined with the cold. My frizzles I've had on and off did just fine though with the coldAh, poor darling! Yeah, double frizzle gene birds are known to have a lot of issues, not just with their feathering but internally as well. How did she do in your Montana winters with that feathering?