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.
13 movies
Renfrew of the Royal Mounted
1937·4.6
White Fang
1936·7.0
Two in Revolt
1936·7.0
A Dog of Flanders
1935·7.5
Wings in the Dark
1935·6.4
Man's Best Friend
1935·7.0
When Lightning Strikes
1934·7.5
The Case of the Howling Dog
1934·6.3
Speed
1927·6.6
Lightnin' Flashes
1926·0.0
Lightnin' Wins
1926·0.0
The Lure of the Wild
1925·9.0
Lightnin' Strikes
1925·9.0