Lith was right about the wargs learning enough earth magic to create a den wherever they liked, but he was wrong about everything else. The voice in their heads was getting stronger with each new member added to their pack and pushed them to practice first magic relentlessly.
It left them enough time to hunt but none to care about their security. This pack bore pieces of Tezka, one of the Master's chosen. He had been a powerful Awakened when he was still a Xogh (Fox-type magical beast).
Even though he had yet to regain any sense of self, his habits were so deeply engrained in his personality that they influenced his hosts. All of their new knowledge, feelings, and tactics came from him.
In a way, their relationship was a twisted version of that between Solus and Lith.