It all has to do with the quest : Heroes of Darrowshire - Quest - World of Warcraft
When you loot Davil's Libram on the upper floor of the house, two Blighthounds spawn. Each of them yields experience (depending on your level, of course), loot and can be skinned. The trick is simple : loot the Libram, delete it, then kill the two dogs. Reloot the libram, rinse repeat.
It has been a seriously fast way to gather skins so far, especially with two people when one opens the Libram and the other loots and skins.
Lovely spot.
But if you've done the quest, I doubt you can do it =[