Last year I was in Lapland with my family during winter vacation. While there we went on one of these husky sled rides. After the ride ended, I noticed that some of the dogs attached to my sled were sort of 'hugging the ground'. As in they were putting their heads and necks against the ground and rolling them. I asked one of the workers at the dog farm what was this about. Was this a method to cool off? The guy informed me that this is not a way of cooling off, but rather that the dogs simply love snow.