Hiya

am sorry to hear everything your poor wee kitten is going through but thought I should share my experience with you. The vet told me Mikey had a heart murmur when i took him for his 1st jag, i was as concerned as you and looked upo the net etc and found out that is was quite common. at his 2nd jag his heart murmur was still there. The vet said that he would not be able to get neutured as his murmur was at level 4 and i think the highest is a 5. I tried not to think about it but at 7.5 months I had him back at the vet to get his claws cut and the vet checked his heart murmur which was now still there but down to a level 1 so the vet was happy to go ahead with his neaturing he was back in 2 weeks later and his op went well. So this only goes to prove this wee kittens can grow out of the murmur through time so i will be keeping me fingers crossed for you that your wee one is as lucky as Mikey.

xx