Thunder the Dog was one of the numerous Dog Stars that sprang up in the wake of Rin-Tin-Tin. He starred in a half dozen movies in the mid-twenties and then disappeared from the screen.In this one, he is the loyal pet of George Hackathorne, a thoroughgoing coward. George behaves like the 98-pound weakling in a Charles Atlas advertisement, but Thunder loves him anyway and when George is drafted in the army for World War I, Thunder decides to join the Red Cross.We then advance several months. Thunder appears to be the relief driver in a Red Cross ambulance and George is sitting by the side of the road, shaking in terror. Eventually things settle out and George overcomes his cowardice because of Thunder's love for him.The movie never quite seems to make up its mind whether it's about George or Thunder. While there is much to be said for that balance in scripting, the quality of the script can't quite maintain that balance as Thunder comes off as smarter than the people he is around. Production values are excellent and the battle scenes look convincing. But don't pass up a chance to see Rin-Tin-Tin, with very good actors and great behind the camera talent, for this one.