How often do shiht tzus go into heat?

A Shih-Tzu will be in heat if they lack of water. For example, when you are walking your Shih-Tzu you need to bring a bottle if water for your dog. Sink water preferable. You can also tell if your Shih-Tzu is in heat by seeing if he or she is sticking its tongue out. Running and playing can lead to heat and giving the dog water after she or he plays is preferable.