This what I found in Howard Hughes’ Once Upon A Time In The Italinan West (not Western All’Italiana as I had thought): “Some Sources note that The Tramplers was shot in Argentina. What actually happened was that Band acquired some footage of gauchos driving a huge herd of cattle through the Argentine pampas ('courtesy of Mr. John Bryan O’Sullivan and the Argentine Estates of Lovril Limited) and incorporates the stock into his film. This explains why Band’s cast never apper in the same shot as the Argentine cattle.”