Bison

 were Earth ruminants K9 once encountered on an unnamed planet in another dimension, partially inhabited by ex-Tellac miners. They lived alongside other Earth animals from widely varying periods of evolutionary history. (AK9: K9 and the Missing Planet)

According to The I-Spyder Book of Earth Creatures, bison were herbivores, and typical prey of the sabre-toothed tiger. (NSA: The Last Dodo)