We got some AWESOME news that we can only conclude is an answer to
Rex's heart no longer has any trace of a murmur.
The vet says that what most likely happened was that when he was
young and diagnosed, the halves of his heart didn't fully form. The
wall between the right and left side was open quite a bit.
In many cases (as in Rex's) the heart heals naturally and forms to
become a normal functioning heart. It's always possible that the
condition will return...but for now, our loving guy is just fine.
Thank you for your suggestions regarding financial assistance.
Although it wasn't needed, your support made me feel...well, not so
alone in this.