In my search for a pup from a responsible breeder I have viewed a cardiology report that found upon physical examination a Grade 1-2/6 soft systolic heart murmur in one side of the bitch. The Colar flow Doppler comments indicate "mild pulmonic insufficiency", "no MR or TR", "no aortic insufficiency". In a final assessment section it checks "no congenital heart disease". It also recommended the Holter monitor testing be done, which hasn't been done. Please comment on your experience or knowledge of breeding dogs with a "mild" heart murmur. The bitch was about two years of age when the testing was done, she is over 4 years now. Thank you for any input. I really appreciate the information and frank posts of people here.