Is Your Shih Tzu Too Thin?

I write more about obesity in the Shih Tzu than I do about a Shih Tzu that could be 'too thin.' In general, the Shih Tzu breed is a hearty breed. My Shih Tzus have been hearty and healthy. This is true even for my Teacup and Imperial sizes. They tend more toward wanting to eat too much.