Strongheart

When silent movie director Larry Trimble decides to put Strongheart, a police dog, into his movies as the lead actor, he must first train him to play with toys and walk like a regular dog, but Strongheart becomes a sensation until his military training leads to trouble, and possibly the end of his career. Includes author's note on the real Strongheart. Before Lassie and Rin Tin Tin, the world's first canine movie star was Strongheart.