Temperature sensitivity

Shih Tzu are considered to be brachycephalic (snub-nosed) dogs. As such, they are very sensitive to high temperatures. This is why many airlines that ship dogs will not accept them for shipment when temperatures at any point on the planned itinerary exceeds 75 degrees  (24°C)

Life span and health issues 

The life span of a Shih Tzu is 13-15 years, although some variation from this range is possible. Some health issues common among the breed are portosystemic liver shunt, renal dysplasia, and hip dysplasia in standard sizes. In addition, they also can suffer from various eye problems. Shih Tzus (and many other breeds) may present signs of allergies to red dye #40, and owners should respond to scratching in the absence of fleas by eliminating pet foods that contain this commonly used additive.

The Shih Tzu can require more care than some other breeds if the hair is kept at show length; they need daily brushing to avoid tangles. A short haircut, also known as a pet trim or puppy cut, can make this a task taking place every month or so rather than of daily. They also need regular haircuts. A Shih Tzu has two coats of fur, with the bottom coat shedding into the top coat rather than off of the dog entirely; as a result, this breed sheds very little in the conventional sense. With regular brushing and bathing, shedding can be reduced to almost nothing. As they shed so lightly, Shih-Tzu are considered to be one of the breeds more suitable for people with allergies.

Since the breed is adapted to a cool climate, letting the coat grow out somewhat for the colder seasons is appropriate, but there is still a substantial difference from a floor-length show coat and a warmer, medium-length winter coat.

Because Shih Tzu noses are small and flat, eating contributes to an unclean face. Once the dog has finished eating, owners often wipe the dog's face with a damp paper towel to remove food remnants. This is another area where the haircut matters; a proper show cut will get more messy (often even requiring the hair to be rubber-banded together for eating efficiently) than other ways of cutting the facial hair.

When they are drinking, it is sometimes necessary to supervise Shih Tzu; water can enter their face-level noses more easily and inhibit breathing. This is why many Shih Tzu are trained to drink from the sort of licker bottles used by hamsters and gerbils. The area around the eyes should be checked each day for mucus buildup and cleaned when needed. Providing the Shih Tzu with bottled water (or water that does not contain chlorine) helps to keep eye mucus to a minimum. Additionally, their claws need to be clipped approximately every month.