This is very interesting. Apparently, some types of bulldogs are illegal in some parts of the world due to it’s breathing requirements.
I’ve heard that the following dog breeds are illegal in some parts of the world for this reason:
Boston Terrier- A lot less than other Bulldogs, but still not good if they overheat too quickly. I’ve also heard anecdotal evidence on Boston Terriers who stop breathing when excited or playful with children, so be careful about how much time your kids spend with them…