no, they didn't tell me how bad it was, but then they didn't give me the weights of all my dogs either. The new girl helping had let all of them out of their carriers and there were dogs all over the examination room.
How old is Brittney? One of my male IG's had the same thing discovered right after his first check up. I notified his breeder and she said I could exchange him (of course I didn't). Anyway, by the time he was 6 months, he no longer had the heart murmer (sp.?).
When mine was first diagonosed with the mermur, I was scared. The vet told me that dogs don't even know they have it and that he could lead a normal life. I was told to just have regular check-ups and he would be fine. Like I said, he grew out of it, your little girl may do the same, she is still young. Just schedule another appointment in about 2 months or so.