There is a trailer for "The Silent Flyer" released in 1926. Silver Streak looks like a Belgian Malinois. He is credited with "Fangs of Justice" 1926, "The Silent Flyer" 1926, "Where Trails Begin" 1927, "Cross Breed" 1927, and "Code of the Air" 1928.
Code of the Air
(Silver Streak)
The Silent Flyer