Ice on the windows behind closed curtains. We've been humidifying the house to help with the dryness of the air. Sadie's been managing pretty well--the furtherst we've been from home is about 10 houses away. That night she wanted to go to the field but it was too cold--paws lifted up so I tried carrying her back home. My glasses were fogged up from steamy breath, carrying a 65 pound dog lasted about 3 houses. I think she knows that it's too cold to go to the field and she needs to be quick when she's outside. We've stayed in the yard and side yard to play--only about three minutes at a time.