Board Thread:WARNING ALL USERS False Info\Spoilers/@comment-96.242.16.254-20130806053824/@comment-5028409-20130806213314

Look at the extended promo for episode 11. It shows Kali and the twins with Black Eyes even though their fangs were out.

I think this confirms that it is indeed caused by the Lunar Eclipse. But again, it might be unique to the Alpha Pack since the normal rules don't apply to them. Again, notice the name of the episode is called Alpha Pact so this might explain how the pack works