Hunt 12 A brontotherium cow located at ( -406, -358, -344 ) /waypoint -406.22, -358.46, -344.42.
To get there go through the Tizmak caves located at ( -285, -335, -82 ) /waypoint -284.91, -335.12, -81.71 to Blisterock Ridge. Tizmak are non-agro and wolf mobs in area don't see thru invis. (And unlike the Shardwurm, baby calves do not count as an update).
a brontotherium bull also gives credit. The bulls can be found all along the upper ridge between Dain's Last Stand and Ring War Battlefield.