Why Shih Tzus work so well in apartments
The size is the obvious starting point. Shih Tzus usually weigh 11-18 pounds, which makes them manageable in small homes, elevators, and shared buildings. They are compact without being so tiny that every normal household movement feels risky.
Their energy level is also apartment-friendly. In our breed data, Shih Tzus score 2/5 for energy, so they are not the kind of dog that needs a high-output household to stay sane. They still need daily activity, play, training, and attention, but they are not a working breed looking for a job all day.
Barking sits in the middle at 3/5. That means you should not assume silence, especially in a building with hallway noise, deliveries, and neighbors. But this is not one of the most vocal small breeds either. Early routines and calm, consistent handling matter more than trying to "fix" the dog after alert barking becomes a habit.
That is why Shih Tzus fit naturally into guides like best dog breeds for seniors: they are small, affectionate, apartment-friendly, and not built around intense exercise.