This post was thwarted by a runaway dog.
I think I get it now: Alvie will run if given the chance. He plowed through about 15 feet of high snow and found the one set of tire tracks on the street. And he just merrily followed them. By the time I caught up to him he was cold and ready to get into the house — anyone’s house!I grabbed him about three blocks away and he shivered the whole way as I carried him home.