Deepest sympathy for your loss, Janice. I have had a similar experience. Cat was taken to vet off and on for three months. Finally sent to a University clinic where nasal cancer was diagnosed. Local vet did not have correct equipment. We beat around the bush while the cat developed bleeding and breathing problems. She is now at the UW undergoing radiation as a last hope. Lesson I learned: be vigilant. Go to another vet if symptoms can not be diagnosed. You did the best you could. No one could do any better than that. Yes, I think people will learn from your experience.