I've certainly enjoyed reading about all the various dogs and feel some small sense of personal connection to them because of it.
Edited by NorCal - 1/16/16 at 9:59am
djblisk, this could be many things and range from insignificant to serious. It's really tough for anyone to offer advice over the internet, so I would seek a professional evaluation.
A buddy lost his best rat hunter this weekend in a freak hunting accident. Here the Terrierman offers a few kind words after the eulogy.
There are varying degrees of heart murmurs and all kinds of causes. Find out what the dog actually has. A friend's Boxer had a moderate murmur and lived a great life until it dropped dead one day. 2-3 years sounds like a pretty severe diagnosis.
As to the decision to spend money on an ill dog, there are two thoughts that have always stuck with me.
1) dogs don't have the expectation of tomorrow (as we know it)
2) you put a dog down when there's something left of him other than his wounds
Sorry I can't be any more help.