"My 11-year-old Shih-Tzu is an absolute lovebug. However, he's also so overprotective of me that he won't let anyone within 10 feet of me. Whenever a new person comes to the house, he growls and barks ...

Your Shih-Tzu’s behavior fits well here since you mentioned that he does much better with strangers when in a public place and that he was totally fine in a house full of people and two other dogs on ...