You may be doing anything, just eating dinner, watching TV, or taking a nap, and your Shih Tzu is staring. Sometimes it may be uncomfortable, but your Shih Tzu is trying to say something with it.
These are the most common reasons;
They are confused.
Shih Tzus are not as good as humans at communicating, and when you are trying to tell something to them, they do not quite get it and stare at you, or just want to know what is going on with you.
They want attention.
The desire for attention is known to all Shih Tzus. They love to interact with their owners, they want all their time to be with you, so if you are not showing attention to them, they may be staring.
They want guidance.
They stare at you to get guidance about anything. When you are training them or telling them something.
They want specific things.
In this time they do not just stare, they accompany they’re starting with something else to get your attention for a specific thing. Your Shih Tzu will stare and add something else to tell what they want.
Their body language is to pay attention as well. Your Shih Tzu may be angry, in distress, sick and more, so not only the eyes will tell you what is the matter. Their body language will show everything.
But do not forget, they stare at you because they just love you!