A Dog Called JackBy: Ivy Pembroke Every street should have a dog like Jack. And every abandoned dog should find a new family like the residents of Christmas Streeta group of people who just might need Jack as much as he needs them . . . All day, he trots happily between the terraced houses, receiving treats and toys, offering a tail wag or lick in return. For Sam, a widower recently returned to London, Jack is Christmas Streets unofficial welcoming committee. For Sams