With their gorgeous short snouts (Frenchies are one of the brachycephalic breeds), Frenchies do not breathe as efficiently as dog breeds with longer snouts, such as the sporting breeds.  Because of their narrower nostrils, they breathe through their mouths more than longer snouted breeds. This results in some unusual noises coming from them, some much more so than others, such as noisy breathing or snorting, even when they have not exerted themselves. We have worked very hard over the years that we have been breeding to minimize brachycephalic syndrome (stenotic nares and elongated palates), by only mating Frenchies that breathe very well for the breed.  This has resulted in puppies which for the most part breathe well and relatively quietly, especially for Frenchies.

Most Frenchies do snore, at least a little (some more than a little), although not nearly as bad as the men in our family. About the only time we ever hear them snoring is when they are asleep on the floor during the day at our feet, and it is only a few of them that snore noticeably, but certainly nothing that is annoying.

If your Frenchie is making excessive noises, unless they have severe brachycephalic syndrome, it is probably because he/she has overexerted himself/herself and needs to take it easy for a while. If a Frenchie continually makes pronounced airway noises, including coughing, gagging, retching, or vomiting, even when he/she is not over exerted, he/she should be seen by a vet experienced with brachycephalic breeds. It is possible that he/she has excessively narrow nostrils or nostrils with weak flaps which close upon breathing (stenotic nares) &/or an excessively elongated soft palate (both of which are related to brachycephalic airway syndrome), which may require surgery to correct.