Summarize:

Once your puppy has become acclimated to its new home, you should select a premium brand of dog kibble with multiple sources of protein for its daily diet.  Look for good ingredients like fresh chicken, duck, egg, pea flour, oats, and rice, and avoid problematic ones like cereals, propylene glycol, corn, and animal fat. Due to their household status as a family member and lapdog, Shih Tzus are particularly prone to fussy eating habits.  If you give your puppy even a little bit of food from the table, it will quickly become accustomed to people food and reject its kibble.  You can avoid these bad habits by never giving your puppy scraps and discouraging begging behaviors. three times a day.  Even if your puppy doesn’t seem to overeat or have a developing weight problem, you should feed at prescribed times during the day rather than leaving the food bowl down. This will help to establish a healthy routine as well as prevent fussy eating habits. You can—and should!—give your puppy treats in order to reward good behavior, but make sure these treats are small.  This way they won’t interfere with your puppy’s meals and feeding schedule.  Consider using individual kernels of your dog’s ordinary kibble and your puppy will be less likely to develop problematic preferences. your puppy daily and take it for professional grooming monthly.  Brushing and cleaning a puppy will only take a few minutes, but it’s important not to skip as it gets them accustomed to the sensations and routine of grooming. Use a mixed bristle and nylon brush to thoroughly comb through its coat and a small pair of scissors to trim long outgrowths or facial fur that impedes vision.  If you keep up with this brushing regimen, you can wait for intervals of four to six weeks between trips to the professional groomer.  Unless you’re trying to raise a show dog, you’ll probably want to give your dog what’s called a puppy cut; that is, a short, all-over style that trims your dog’s coat to one to two inches. You can choose to grow your Shih Tzu’s coat long like show dogs, but be prepared for more demanding grooming commitments.
Pick a premium brand of dog food. Feed your puppy Brush