Laura, I do not think a 3 is a death sentence. Willow and Fern both have grade 3 murmurs and they are both the type that stress very easily. I have not had to do anything special for them except keep an eye out for labored breathing or other shortness of breath. They have never had any trouble at all and are 2 of the healthiest cats of the bunch.

So, YES, of course, have the tests done, hit all the bases, but do not panic.

Prayers for Giz.