Ace the Wonder Dog was a German Shepherd Dog that acted in several films and film serials from 1938 to 1946. His first appearance was in the 1938 Lew Landers film Blind Alibi. He is considered by many critics an attempt by RKO Pictures to cash in on the success of Warner Bros.' canine sensation, Rin Tin Tin. [Wikipedia] His birthday is uncertain, but he was born before 1938 e dies after 1946.