While respiratory infections are a frequent cause of coughing in our pets, there are many other disease processes that may result in a cough. (polosprings.com)
A liver biopsy specimen is also taken at the time of surgery to rule out presence of other disease processes such as microvascular dysplasia. (svsvet.com)
Certainly that is not the case with all Wolfhounds... but I would recommend looking at an MRI as a less invasive procedure that may give better information for us to rule out other disease processes in suspect FCE cases. (iwfoundation.org)