The holy hand-grenade of Antioch

One of the things I'm enjoying in Cataclysm at the moment is just wandering around and visiting strange areas of the map that were previously unreachable.  One of the odder parts that I've found recently is just north of Thunder Bluff, at the top of the path labelled Stonetalon Pass.

There you can find an area full of very strange critters indeed.

Killer rabbits:

Knife-wielding prairie dogs:

Mice with shotguns:

If anyone has the remotest idea what these strange creatures are doing there, I'd love to hear it. Even more strangely, they appear to change back and forth between this form and normal critter form from time to time. It's a mystery...