Well I cant speak for all shihtzus but I can tell you mine didn't she is just fine,The same as before beginning and end also out of all the ones I've seen none had these problems.
I guess it depends on the dog body.
Its either that he or she love its food or if its a female shih tzu, it can be pregnant
Shih Tzus are generally from Japan!
The Shih Tzus nickname is "The lion dog".
Some shih-tzus have cherry eyes. My shih tzu has one.
Black Shih Tzus are not considered "Rare" but there not as common as the black and white Shih Tzus. I recommend this breed to anyone.
Shih Tzus are primarily used as Companion Dogs.
Shih tzus can live with any dog as long as there not vicious, and are socialised properly.
Shih tzus weigh 9 to 16 lbs. I have two Shihtzus and they both weigh 14lbs.
Just like your question, both of the male shih tzus are the fathers.
Why Yes They Do
no
the Shih Tzu does shed especially the female when she is in heat, pregnant or nursing. And they DO mat and they mat a lot! they need to be brushed every day to avoid it