Bathing a Shih Tzu can be challenging especially the face. Because Shih Tzu's are a Brachycephalic breed, meaning they are a short-nosed dog, washing the face can be difficult. Be careful not to get water in the nostrils. Using a cup or a cloth may be safer for face washing or better yet use a waterless shampoo on the face. When using a shower hose to wash a face, put it on low pressure and use your thumb and fingers to spread the water on the face. Never blast the water hose into the face, the dog can choke and possibly drown or get a lung infection.