German Shepherd
The German Shepherd was a breed of large-sized dog originating from Germany on Earth. They were used as guard dogs and for search missions.

In 1944 of an alternate timeline, a pair of German Shepherds, on leads, were used by a group of Nazi soldiers who conducted a search of a crash-landed  in a wooded area of New York. After the shuttlepod was remotely detonated by its former occupants – Commander Charles Tucker III and Ensign Travis Mayweather – the two dogs and their masters cornered Tucker and Matweather. ()

After being sent back in time to 1947, Odo stayed out of sight by posing as a German Shepherd employed as a security dog by the United States of America Army Air Forces. ()

A German Shepherd was serving with a security guard aboard the  in 1986 when Chekov and Uhura sneaked in to collect photons from the ship's nuclear reactor. ()

An angry German Shepherd tried to keep the crew of the  away from the barn aboard the Caretaker's array so they wouldn't find out about the true nature of the space station. ()

External links 
 
 
 German Shepherd Dog at The American Kennel Club

de:Schäferhund
Earth animals
Canines