The last we checked in with LittleDog, the smaller, scrappier version of BigDog and frequent resident of my worst nightmares, we took some solace in the fact that he wasn't quite as nimble as his predecessor. Now: terrifyingly nimble!
It may not make the same freaking scary noise as Big Dog, but Little Dog is even creepier than its big brother. I think it is because of its small size. Smaller creatures are always creepier, even when they fail.