Brachycephalic Obstructive Airway Syndrome (BOAS) The term “Brachycephalic Obstructive Airway Syndrome” (BOAS) refers to a group of conditions resulting from the body conformation of dogs with short noses (brachycephalic dogs). Common breeds of brachycephalic dogs include English and French bulldogs, Pugs, Shih-Tzus and Pekingese. Other breeds with longer noses, such as Cavalier King Charles Spaniels and Staffordshire Bull Terriers, can also be affected, although less commonly.
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