HazelNut has no problem with the cold. We live in Upper Michigan, 20 degres here today and went for a mile walk. She was all full of snow and having fun, she is a BIG Yorkie, 9 pounds. Last winter as a little pup she loved the snow, cold rain is something else though. I had a 4 pound Yorkie who could never stand anything under 75 degree's. This is why this big one is SNOW much FUN!