Shih tzu are renowned for their perky, happy temperaments. They are lively and friendly. Shih tzu tend to get along well with people of all ages and with other dogs as well as other pets of different species.
Saint Bernards are loving, placid dogs. Their instinctive friendliness is likely to offset a stranger's initial fear of approaching such a large dog. However, Saint Bernards are equally quick to protect family members who they believe are in danger.