The Shih Tzu’s small size has everything to do with ... Due to their small mouths, Shih Tzus tend to have overcrowded teeth ...

Shih Tzu and Lhasa Apso are both small, purebred companion dogs native to East Asia. The Shih Tzu, on the other hand, is of Chinese ancestry, and the Lhasa Apso, or Lhasa for short, is Tibetan in ...