Shih Tzus have a lifespan of around 10 to 16 years. If you want to give your furry friend a long and healthy life, make sure that you monitor their health and grooming needs on a regular basis. Obtain all relevant information regarding their feeding routine, potential health issues, and more from the breeder/pet store you get your Shih Tzu from. Also, it is always advisable to take them to a vet for regular health checkups.