http://www.cat-world.com.au/Cat-Health- ... -cats.htmlIt's actually "Grade 2", but anyway... it does say murmurs can go away after a few months. Does this breeder have any health guarantee or have they said if something were to happen and it was serious, that they would replace the kitten? Me personally, I would probably opt for another kitten... but that's just me. I am a very emotional person and I can get attached to a kitty within minutes and if something were to happen to that kitty within a few months.. I would be emotionally devastated.