My ChiWeenie dog, Marley has a heart murmur. They want $500 to do a test to find out why he has the murmur. After that he will either need surgery or heart medication for the rest of his little life. The vet said he may not live long passed 3 years old. He's now 2 and a half. I'm so attached to him and can't bare the thought of losing him. Please help me get him fixed.