What do you mean they're speaking "dog"? Pakkun's talking the way he always does.

[ For emphasis, Pakkun barks in the background, and Kakashi nods as though it makes perfect sense to him. Of course, to him, Pakkun's talking rather normally, and he doesn't hear anything different at all. In fact, the only thing that seems different is the fact that more than half of the pack is missing. But at least, he'd managed to summon some of them at all. ]