See my Patch 4.2 Rare Pet Briefing Post for an updated guide on how to tame Skarr & Karkin, as well as the other 8 Patch 4.2 Taming Challenge pets.
Neither of these two new pets are exotic, so hunters of all specs will be able to tame them. One is ferocity and the other is tenacity. Both of them, as far as I know for right now, have unique skins — and badass ones at that. 😉
Hold on to your hats folks, because these two pets are both pretty awesome…