Shih Tzus are known for their cute faces, expressive eyes and distinct hair. The hair of this breed is possibly the first thing you would notice. Their hair is long, beautiful, and grows very fast. That also poses a huge challenge for those who have a Shih Tzu at home. One has to invest time and money on grooming the a Shih Tzu's hair. And that kind of grooming can be quite demanding. On a positive note, most people who have a Shih Tzu actually love to experiment with the canine's hair and that makes for a fascinating experience.