I have a 12 (13 in January) year old Bichon, Mimi, who also has a severe heart murmur. I've noticed a hacking cough that comes and goes. I know it could be the heart problems, but also sounds like what people describe with a collapsing trachea. I'm planning to get her in to the vet next time I get paid in about a week. I need to get her teeth cleaned, but I'm nervous about the anesthesia with the other problems. I can update once I get her looked at, but I wonder if anyone else has had experience with an older dog with this combination of issues. I'm not sure if I can find someone who does no anesthesia tooth cleaning. Is that even a thing?