From IMDB.

From IMDB, newspaper clipping on Bette Davis with a Great Dane and Monika Heinreid with a smaller dog. Text reads: "Two energetic dogs, one small and cuddly, the other big and seemingly ferocious, enlivened the filming of 'Dead Ringer,' new Warner Bros. shock movie due to open....at the .... Theatre. Babette, two-pound poodle pup, belongs to Monika Henreid (left), screen-debuting daughter or Paul Henreid, director of "Dead Ringer." Duke, 175-pound Great Dance, a seasoned screen performer, appeared in many key scenes with Bette Davis (right). Both dogs were on set often and provided much fun for the "Dead Ringer" players. But director Henreid kept grim-visaged Duke separated from frilly Babette, lest he turn too frisky for his role as a vicious protector."