After seeing many surgical corrections for brachycephalic syndrome, I am well aware of the anatomical deficiencies of the construction. Interestingly enough, the problems with brachycephalic syndrome is in stenotic nares (pinched nostrils), elongated soft palate, and everted saccules as well as undersized or collapsed tracheas. I have intubated a 60# dog with an endotracheal tube small enough to be the proper size for a cat. These dogs also have decreased lung fields, and this can be an issue in any breed with poor sternebrae and thoracic construction. This is why breeding for excessively stout, barrel chested or "sprung" dogs can cause wind deficiencies regardless of muzzle length. Boxers have a remarkably well constructed thorax; the thorax of a runner. This combined with no soft tissue issues in their upper respiratory tract, means a functional short nosed dog. Boxers have their plague of genetic issues, but BS is typically not one of them. This is why they are considered (to those who know) a great outcross for the bulldog "look" but not the "issues." Here is a link showing these anatomical upper airway deficiencies and the surgical corrections: http://www.acvs.org/AnimalOwners/HealthConditions/SmallAnimalTopics/BrachycephalicSyndrome/ ...just ignore the "short-nose" comment, as that is actually incorrect. :)