My male 3 y. o. Chihuahua has a slight heart murmur.Or says my Vet..
My question is:
Will he be alright?
Will he not live as long of a life because of this slight ailment?
Is there anything I can possibly do for him? Meds? Diet?

He is a fun & playful lil dog,always happy,(as far as I can tell anyway) :)
He is also not neutered,if this makes a difference.

His weight is about 8 lbs.
He is my lil boy and I don't want anything to happen to him.If I can help it that is.

Your response would be lovely. :)