No, it is not necessary or recommended to bathe your Shih Tzu every day. In fact, bathing your Shih Tzu too frequently can strip their skin and coat of natural oils, which can lead to dryness, irritation, and other skin problems. Shih Tzus typically need to be bathed every three to four weeks or as needed. However, if your Shih Tzu gets particularly dirty or smelly, you may need to bathe them more often. When you bathe your Shih Tzu, use a mild dog shampoo and conditioner and rinse them thoroughly to avoid skin irritations. If you need to freshen up your Shih Tzu between baths, you can use a dry shampoo or wipes designed for dogs. These products can help remove dirt and odor without the need for a full bath.