I’m so sorry about your dog..I just came across your post while researching collapsed trachea for my 13 year old Maltese. He started coughing on Thursday and by Saturday night was not stopping. Took him to the Vet on Sunday and was diagnosed with collapsed trachea. Same meds as your dog did not help. I haven’t slept much. I called the vet again this morning and he changed the frequency of the meds. It’s 3am and not much help but only for an hour of no coughing. I’m scared this might get worse. My dog is always home, we don’t smoke, he has never worn a collar, he only walks outside at night. I’m trying to find help but seems as if there’s nothing more than the same meds...