Well, I do have a SHih Tzu and her face is smooshed in .... That is how the AKC standard is for that breed, and she is the one who has the reverse sneezing and sometimes Snorts ..
My yorkie's do not have that look , and they do not have problems like my shih tzu. Although some yorkies can suffer from the same thing as a shih tzu does.
Both of my yorkie's seem pretty normal faces to me. Nobody has mistaken them for a rat or anything. Not a fox like face . Just the average looking type. Only thing is that Suzi is darker colored . That makes her not up to the standard look. But, we love her dearly no matter what.