shih tzu how long they live.
In general, dogs will live an average of 12.8 years. However, toy and small breed dogs live longer than medium or large breed dogs. Therefore the Shih Tzu life span has a range of 10 to 16 years. The average is 13 years old. And since this is an approximation, some Tzu can live longer...17, even 18 years. Much the same way that it often happens with humans, females Tzu will - in general â live a bit longer than males â approximately 1.4 years. Leading Causes of Death in the Shih Tzu Breed.