For smaller breeds, you only want to feed once or twice a day. Feeding too many times a day makes it harder to control when your dog has to go. For some reason Shih tzus are one of the hardest breed to house train. Some are easier than others, but for the breed as a whole, they are the hardest to train. It can take up to a whole year to train your dog. Take your dog out every hour until it understans that it has to go outside. Since Shih tzus are small breed dogs, you can also train your shih to use a litter box. Maybe you can put a litter box in it's cage?
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