Congrats to Lily on being chosen Cat of the Day! Lily's heart murmur will likely be less trouble than expected. My first cat years ago, Rianne (pictured here with me) had a heart murmur which I found out about after she had kittens, and Rianne lived to be 18 years old. Towards the end, the vet thought it might cause fluid accumulation, but it didn't. Recently, the vet heard a heart murmur in one of my current cats, but the next time, it was gone, and I was told they can sometimes come and go. So next time Lily is at the vet, have them check again. But still, it's best to have her spayed. May beautiful Lily have many, many healthy, fun years to come!