Lhasa's are great, but they like so many animals who have had hard lives care this with them. So as far as the growling and making the cats go away after they wake him up, this will take time (and it may never totally go away, but will get less and less). Charlie may have had some BAD experiences with trying to sleep and having others attack or try to attack him. He is still learning the lay of the land at his new home, so the cats need to learn that he doesn't like a lot of closeness when he's sleeping. I have found that Lhasa's are very "Soft Hearted", so they do care there feeling on their paws (so to speak). As for being a little aloof, part of this come from his history and the bread (being a guard dog as well as his former life). Over time your little guy will find his place in your household and things will be much easier for all. Good luck and enjoy