The whole saber tooth thing is a puzzle - seems awfully awkward for eating, and in the case of this kitty I imagine this scene:
Saberkitteh lurks unseen in the shadows awaiting prey. Giant platypus waddles by and saberkitteh leaps on it's back and plunges her fangs deep in the muscle of platy's neck. Platypus quacks out in pain (no echo from the surrounding cliffs) and accelerates her waddle, dislodging kitteh's grip with her claws. Two days later Platy is still waddling on as saberkitteh swings back and forth on platy's neck hanging by her fangs and thinking, "thibs ib a hegck ob a fix - my lower jaw can moobe bud nod my ubpper - how do i ged thebe fangs unstugck?"