Dogs with this condition are often characterized as having a "smoker's cough."
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“The most frequently observed clinical sign in dogs with eosinophilic bronchopneumopathy is cough, which is documented in 95% to 100% of cases. The cough is characterized as persistent and harsh and is typically followed by gagging or retching, likened to a “smoker’s cough.”
-Christine M. Venema, DVM, and Coretta C. Patterson, DVM, DACVIM
From Diagnosing and managing canine eosinophilic bronchopneumopathy