The trouble is Deuce. He's 90 lbs of sweet, lovable, cringing, beta-ness who farts out his innumerable anxieties all day and night. He cracks us up and grosses us out in equal measure. He is a really nice dog. He's very, very sensitive though. We can't know why he's so cowering. They found him when he was a tiny puppy - lost or abandoned and nearly starved to death. He's about seven years old now and well taken care of. In this past year, he's become very attached to our family.
Dogs like this are pack-oriented; they find security in having a pack around them, and for them familiarity breeds contentment. I've raised four dogs, have a reputation as a dog whisperer, and I've had several others in my childhood. In my opinion, a dog this pack-oriented cannot change. They are what they are and no amount of support will turn them into a self-confident dog.
That said, there are two things you can try.
One is to take Deuce to agility training, or some kind of dog sporting competition like diving, hunting, etc -- whatever he might like. Give him an opportunity to score some wins in and he might feel more secure in his place in the pack.
But he's getting up there in years, so it may be too late to introduce him to a new sport. The cheap and easy solution is to get a puppy. Cringing omega dogs turn completely around when another dog is introduced. They will either feel threatened and become aggressive -- that kind of behavior you need to stamp out, firmly but gently -- or they become loving protectors of the new family member, and they feel much safer because their pack has grown in size. You'll want to get a puppy, because an older dog might win a test of dominance against him no matter what their size. (I've seen a Chihuahua dominate a Great Pyrenees.)
In general, though, I wouldn't worry too much. He'll mope and be depressed when you're not around, but if you visit frequently he'll eventually get the idea that his pack is intact just far away. He won't get any *less* neurotic, mind you, but he probably won't spiral into any state much worse than what he is now.
All IMHO. Good luck.
