Cuore di cane (German: Warum bellt Herr Bobikow?, International title - Dog's Heart) is a 1976 joint Italian-German film directed by Alberto Lattuada based on a novel by Mikhail Bulgakov adapted by Mario Gallo. Screenplay by Alberto Lattuada with Viveca Melander. Composer - Piero Piccioni, editor - Sergio Montanari. Cinematography by Lamberto Caimi. Production companies - Corona Filmproduktion, Filmalpha, distribution by Constantin Film. Runtime - 113 min.