Warrigul

Warrigul were predatory reptilian quadrupeds found in Romulan space and kept as pets by both Klingons and Romulans. They somewhat resembled Terran dogs or Vulcan le-matyas.

The Klingon commander Kruge had owned a pet warrigul since he was a youth, and let the animal sit beside him on the bridge of his bird of prey. The warrigul accompanied him during his exploration of the Genesis Planet, but died shortly afterwards during a battle with the USS Enterprise. 

In the twenty-fifth century, domesticated warriguls were a common sight in the Romulan mining colony in the Hfihar system. Wild or feral warriguls roamed the outskirts of the colony, and were prone to attack any passers-by on sight.

Tal Shiar Commander Hakeev used warriguls, among other animals, to test the combat abilities of his prisoners in an arena in the Nopada system. Wild warriguls could also be found in the desert canyons of Nopada.