Mostly dry, with a small qualification
A Shih Tzu is a light drooler, nowhere near the breeds that trail saliva across a room, but the honest answer carries a small qualification that other dry breeds do not need. The Shih Tzu's mouth is set in a short, flat face, and that compact shape does not manage saliva, heat, and breathing quite as efficiently as a longer muzzle. The result is a dog that is dry most of the day yet may show slight dampness at the mouth after drinking, during excitement, or in warm weather when panting increases. Owners describe it as occasional dampness on the beard rather than drool in any dramatic sense, and for most households it barely registers as a chore. Owners who use a raised, shallow bowl often notice less beard soak at drinking time, a small adjustment that suits this breed's short face and keeps the chin drier through the day without changing the routine.
Teeth are the hidden variable
If one factor decides whether a particular Shih Tzu drools more than expected, it is dental health. The breed's small, crowded mouth traps plaque readily, and sore gums, loose teeth, or an aching tooth can all increase saliva while the dog still eats and plays almost normally. Regular tooth brushing, dental checks at routine visits, and attention to bad breath keep this variable controlled, and they matter far more for a Shih Tzu than for many larger breeds with roomier mouths. A dog whose drooling creeps up over months is often telling you about its teeth. This is the one area where a chooser should budget real, ongoing effort, because prevention here is cheaper and kinder than treatment later.
Face hair, beards, and everyday dampness
The Shih Tzu's facial hair turns small amounts of moisture into a housekeeping detail. The beard dips into the water bowl, holds dampness against the chin, and can develop a sour smell or stained, irritated skin if it stays wet and unwashed. Many owners keep the beard shorter than show style, use a bowl that limits how much hair falls in, and wipe the face after drinks and meals as part of the normal cuddle routine. Tear staining and eye discharge belong to the same daily face check in this breed, so one gentle wipe covers several jobs. None of this is burdensome, but a chooser imagining a dog with no face maintenance at all should look at the whole grooming picture before deciding.
Drool changes that need the vet
A Shih Tzu that drools suddenly and heavily, refuses food, paws at its mouth, or drools on one side needs a prompt veterinary visit, since mouth pain and dental emergencies are common causes in this breed. Drooling with noisy, laboured breathing or overheating signs is more urgent still, because a flat-faced dog has less reserve when breathing is compromised. Gradual increases paired with bad breath, bleeding gums, or difficulty chewing belong at the next appointment rather than on a watch list. Bringing clear records speeds up every one of those visits, and KinsLe Pet Passport holds a Shih Tzu's records together in one portable packet, ready for the vet, a trip, or a boarding handoff.