I am surprised to see this thread resurrected. We lost Rosie last year, only two months after her collapsing trachea and enlarged heart and liver were diagnosed. Two vets said it was genetic and not our fault, but you know that is small consolation. We had planned a nice peaceful home euthanasia, but when it all happened, that was not to be. A visitor ringing the doorbell sent her into coughing spasms that we couldn't stop. We had to go to vet emergency at night where they did the best they could to make her comfortable and not afraid. I think that CHF is one of the hardest ways to lose a dog, since you see the fear in their eyes. I hope nobody has to go through that ordeal with their beloved pet. So hard.