OMG, I can't believe you are actually HERE! Ya know how much I have missed you!!???? Well, MUCH. I so miss your wit, humor, one-liners, and your intelligence. I would just love to see you here more. Like, a LOT more...hint hint.
As for Thor...yeah, that is really young to see any kind of age-related slow down so I do think something seems to be bothering him. If he does indeed have pyoderma (staph intermedius) on his skin, that's usually treated w/ Simplicef x 30 days. Shampoos don't really get rid of pyoderma, so maybe that's why he's feeling yucky? Can you see the pyoderma all over, or is it just local? Lastly, Cushings does cause a "slow down"/lethargy...but it honestly doesn't sound like he has any other single symptom (well, skin infection is one though)...so I think it'd be highly unlikely. But just to be safe, read through this and make sure it doesn't sound like him:
Cushing’s Disease Summary
So...we need an update! Are you still in San Fran? Same job? Still traveling a bit w/ Thor? Please share *all* personal and private information please

!