Thanks everyone. I'm hoping for the best, but as with anyone with a heart condition, prepared (sort of) for just about anything.

You'd never know he has any issues, as he's just the same goofy boy that he's always been. He's a little less active, but can still take off like a bat out of h3ll after a rabbit or cat that happens to stray into "his" yard, and never even get winded. I do try to discourage the running tho. And of course there's not a thing wrong with his appetite!

I'll keep you posted after I learn more.