Why a Conditioner Is Vital
Shampoo is by no means meant to be used alone. During the shampooing process, hair cuticles open. You need a product to soothe them closed. If not, the coat can become super-dry and frizzy. So, both of these products work hand-in-hand.
Why A Leave-in Spritz is So Important
If you are using a really great shampoo & conditioner, you are 2/3's of the way there! If you're not using the final needed product of a leave-in, your Shih Tzu will not look his/her best.
Quality bathing products are important for their own reasons and will have some extended benefits. However, if you are giving your Shih Tzu a bath every 3 weeks as recommended, what is being done for the coat on those 20 days in between?
Using a leave-in spritz is the answer and can make a huge different in both how a Shih Tzu looks and the health of the skin and coat.
A quality spritz will help prevent split ends, protect from contact friction and static, and add a layer of protection from outside elements including the sun and arid air, help prevent tangles, and as an added bonus, help your Shih Tzu smell nice and clean. In addition, you do not want to dry-brush a coat; a light misting of a spray while brushing is best.