I just came back from (a different) vet and guess what?, Cairo's heart murmer has disappeared. i thought of Baroo, and wondered if you may like to know that this vet believes heart murmers in Basenji's can come and go, like with dogs in general. Apparently, sometimes the heart valve positioning creates the murmer-rush noise, but that it is temporary and so doesn't reflect a cardio problem. Hope that his is so with Baroo too. Good luck.