Gonz, he does wear a thundershirt when things happen that are abnormal to our routine. If I go into work at a different time, if friends are coming over that arent here on a normal basis, etc. but if he wears it too much he will start being stressed from just not having it on. My biggest hesitation with adding another dog is that he has never seemed to really enjoy the company of another dog. He basically ignores them, and then tries to play once in a blue moon.