Shih Tzus are a brachycephalic breed. Shih Tzus have a short nose and a flat face. Their facial structure is what often causes the snorting in the breed. It is essential that you avoid having your Shih Tzu in the heat for too long as well. When they are outdoors make sure they have plenty of water and shade. Also, make sure you never attach a leash to the collar of your Shih Tzu. This can cause pressure on the dogs already sensitive throat area. Please use a harness instead for walking. The collar should only be used for dog tags.