Hi all,
first a slight correction ;) the stealthed cats mentioned above are actually not cats, they are wolves called Silvermane Stalkers. the drop rate is not that high (you'll get more thick than rugged), but you have a chance to get thick wolfshide (for tribal leatherworkers). It is maybe the best spot to start farming rugged leather, but i suggest you to move to Un Goro Crater as soon as your lvl allows you to do so. You can go there now, but don't go there alone (at your lvl). There are many quest that involve killing of beasts that drop mostly rugged leather, so you'll get xp at the same time you get the leather :)