Our group fought these today...tough lil boogers to be sure! We are avg lvl 14, so it will get easier. They are good xp, not so good loot. But who'd expect a gorge hound to carry a nice sword anyways? :)
Gorge hounds are a royal pain in the rear end. Even at level 24 they go aggresive almost instantly if you go near. They will attack anything, and they do gang up. Its not uncommon to see some mid-20, low-30 player running to the zone with a dozen of these things in pursuit.