 When Dodger sings "Why Should I Worry?", introducing Oliver to New  York, Pongo from _One Hundred and One Dalmatians (1961)_ (qv) can be  seen (with Rogers arm holding his leash) Jock, Peg and Trusty from  _Lady and the Tramp (1955)_ (qv) also appear. All follow Dodger  along the street.