Lightning the German Shepherd
Lightning was a German Shepherd from a line of canine silent film stars. A grandson of Strongheart, Lightning was billed as "The Wonder Dog" and "The Marvel Dog". He began life as a runt but grew to be larger than average for the breed, and he was very intelligent. Lightning appeared in numerous movies.
From Wikipedia.
Movies
Renfrew of the Royal Mounted
Lightning, Renfrew's Dog
White Fang
White Fang
Two in Revolt
Lightning - the Dog
A Dog of Flanders
Leopold, 'Leo' the dog
Wings in the Dark
Lightning - Ken's Dog (uncredited)
Man's Best Friend
Lightning, Jed's Dog
When Lightning Strikes
Lightning
The Case of the Howling Dog
Prince (uncredited)
Speed
Lightning', a Dog
Lightnin' Flashes
Lightnin' - the Super Dog
Lightnin' Wins
Lightnin' - the Super Dog
The Lure of the Wild
Shep the Dog
Lightnin' Strikes
Lightnin' - the Super Dog