The Slap-Hoppy Mouse Sylvester Cat takes his son, Junior, on a mouse-hunting expedition in an old, broken-down, mouse-infested house near some railroad tracks. Details Casts Galleries Posters Title The Slap-Hoppy Mouse Release Date 1956-09-01 Runtime 00 Hours 07 Minutes Genres Animation Comedy Production Companies Warner Bros. Cartoons Production Countries United States of America Mel Blanc... Sylvester / Sylvester Jun... Original Size (2918x1642) Original Size (1000x1500) Original Size (1000x1500)