As Much as They Want
Many shih tzu owners leave a bowl of dry dog food out all day. The puppy can eat when it feels hungry. This method provides the animal with ample nutrition to meet its growing needs.
One Ounce Per Pound
According to the All Shih Tzu website, a shih tzu puppy needs to be fed three times a day. It should eat one ounce of food for every pound that it weighs. For example, if the puppy weighs five pounds, it should eat five ounces of food at each meal.
A scheduled and measured diet is healthier for shih tzu puppies. Free-fed puppies do not develop disciplined eating habits. In addition, it is difficult to get the puppy into a housebreaking routine if it can eat whenever it likes.