The vet does not believe he has cushings or that anything is wrong with his teeth. He mentioned ulcers which seems like a possibility especially if he really is more stressed than he appears. The vet is also a chiropractor/acupuncture person so Roz got the royal treatment with both of those things. It will be interesting to see if there is any change in him.
As I was pondering all of the different behaviors I have been seeing I realized that Roz may not like the grain he has been getting. It was re-formulated this fall and he has been picky about it since then. At first I thought it was the cool calories he was also getting but he has been off cool calories for at least a couple of months and he's still acting picky about his feed. Along with that, one of the complaints I had was inappetence but in thinking about it more it's not really inappetence. On the days he doesn't finish his grain he still goes right to eating his hay. Now I'm going to try some different grain to see if he is more enthusiastic about it.
Long story short, there's nothing really easy/obvious wrong with the old man. His body condition is great and he appears to be in overall good health.