Brachycephalic obstructive airway syndrome (BOAS) causes chronic respiratory distress in affected breeds, with corrective surgery significantly improving welfare outcomes when performed at appropriate age.
BOAS causes chronic suffering that owners and veterinarians often underestimate or normalise. Respiratory noise and difficulty are treated as breed characteristics rather than welfare indicators of chronic distress. Affected dogs experience reduced exercise capacity, impaired thermoregulation, and disrupted sleep. Quality of life in severe BOAS without surgical intervention is significantly compromised. Early corrective surgery — ideally before 12 months — provides the greatest welfare improvement. The root cause is selective breeding for exaggerated flat-faced anatomy, and long-term welfare improvement requires breed reform and stronger regulatory oversight of breeding standards.