My vets can't explain this to me... but maybe someone on this forum has had a similar experience. My dog 5 years old now. When she was 2, she got a bit of kennel cough, I took her to the vet and in the course of the exam, the vet hears a murmur. 2 weeks later (and a course of antibiotics) it's gone.
The dog is disgustingly healthy. She's an athletic Master Hunter, actively campaigned, a hard charger. But from time to time, on incidental exams, the murmur is there (grade 2 out of 6). Other times, it's not.
I considered retiring her (because I thought, based on the vet's findings, she had heart disease) but seriously, how do you tell a dog like that to "settle down and take it easy." And she's never shown any symptoms. And whenever the murmur is heard, it's the same grade 2. A chest film showed an "enlarged heart" but she is an extreme athlete... of course it's enlarged. Oh, and it was suggested I take her to a canine cardiologist for an echocardiogram, EKG etc. etc. but that would have approached a 4 figure number... for a dog with no symptoms. I just couldn't justify the cost. (Am I a terrible pet owner?)
Anyone ever seen this sort of thing?