Stuck in a shelter, a resourceful Terrier named Harvey markets himself to prospective adopters with a video showing him delivering slippers, playing chess with junior, doing laundry, roasting chicken and even cleaning windows. It’s a commercial within a commercial created by UK-based Thinkbox to promote TV as a marketing medium while making a sweet case for the joys of adopting a shelter dog. (The pup performer who plays Harvey was once a stray himself.) Harvey crossed the pond late last year via YouTube and Facebook — check him out.