Training your Shih Tzu to come when called is an effective way to avoid a situation such as this and keep your furry friend safe, even when they are off-leash.
While you are training the 'come' command, there are a few things to keep in mind. Never ask your pup to come for something they dislike, such as a bath or having their nails clipped. You want the word "come" to be associated with positive things so your dog is more likely to respond. Also, if your Shih Tzu doesn't come right away, don't chase after them. Most dogs love to play chase and you running after them will only encourage them to keep running.