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The viewed print was incomplete and had no credits. In 1932, the picture was approved for exhibition in New York by the New York State Censor Board. At that time, the title was listed as The War Dog. The 1932 version, for which no reviews have been located, appears to have incorporated large portions of the 1925 silent film His Master's Voice, with some sound sequences added. The above cast and production credits were taken from copyright records and a Variety review for the silent film. Although the plot remained essentially the same, the character names in the 1932 film were different. Also, Thunder is billed as the canine star of His Master's Voice, whereas Rex is credited with the title role in The War Dog; it has not been determined whether these dogs are the same.