Common feline geovore herder species grazing the rock-filled mountains of planet [EF] Rubella.
Whether they get their perpetual immortality naturally or from the rocks they consume is unknown. However a hardy turtle shell and vulture like clawed hands and feet suggest survival is of utmost importance.
[EF] Donguins are Orthogonal. They're testosterone dominant and reproduce by rubbing their erect testes with another [EF] Donguin's testes through a cuddling mating strategy.
They display an uneasy caution in the face of novelty, untrusting of strangers and strange situations. When feeling threatened, they let out a weary cry and waddle like a penguin away from the apparent threat.
Dense teeth like a rabid dog and a series of extremely acidic stomachs allow them to consume a diet mostly consisting of rocks.
With one of the strongest acidic stomachs known in the Universe, it's not surprising to note, their heart pumps acidic blood through their veins. Hunting these Felines can be a chore as acid spurts out from their wounds and burns the ground with which this creature flees on. As a result, many mountains have a jagged like appearance thanks to the Donguin's acidic blood burning through.
To bait these creatures, feed them Fermented Fruit. When farmed, they produce Leopard Fruit from their pouch. When hunted and killed, 5 Feline Livers can be harvested.