Thank you all for your encouraging words. I did get a second opinion, right away (another vet in the office) and then we got a third from a different vets office altogether. He has a heart murmour of 3 or 4 out of 6 and it's developed in the last 8 months or so. The next step is to have a travelling specialist come and give him an ultrasound. My parents are going to help me find the money for his fees (over $1000). After that, the'll know what kind of meds he should be on and have a better estimate as to how long he'll live.
To compound things, he's having a small reaction to the rabies vaccine from yesterday and appears achy, lethargic and has a lowered appitite. I'm sure my walking around upset doesn't help much too. He's slowly starting to feel better though, his eyes look better this morning than they did last night.
All of this is such a shock! He has shown NO signs of any problems what so ever. I thought he'd be around for a long time. I'm just greatful that I truly have treasured every day we've had, and I've spoiled him rotten.
One day at a time. First shot recovery, then ultrasound then we'll see. I'll leave updates in the health forum from now on.
Thank you again.