The glommer, a prototype genetically-engineered tribble predator created by Klingons ("More Tribbles, More Troubles" episode of Filmation's Star Trek: The Animated Series), stalks a group of tribbles. The glommer is the four-legged, orange creature pictured above. Note that the handsome brown tribble (left) once appeared onscreen in the live-action "The Trouble With Tribbles".
The glommer selects a Filmation-pink "safe" tribble, which has also been
genetically enhanced to prevent it multiplying out of control.
An upside down glommer is sated!
The Klingons' glommer breeding program must have been successful after all: glommers (each with one "safe" TAS pink tribble as sustenance) are finally available through David Gerrold's Tribble Toys website or Roddenberry.com!
As it appeared on "More Tribbles, More Troubles"