Miki represents a significant problem with brachycephalic breeds, in particular in British bulldogs with hypoplastic tracheas. As we know, their excessively squashed faces cause enough welfare issues, but many dogs also have a trachea (windpipe) that is abnormally narrow which exacerbates their breathing concerns.
Airway Considerations
Almost all brachycephalics suffer airway restrictions to an extent; it’s just a matter of definition.