Drooling
Hamlet, our boy, is a drooler when he gets alone. It's really probably SA.
At the advice of many great ppl here, I got the DAP dispenser. I put it in the living room, and noticed that Hamlet was sort of "drawn" to it. When it came time to leave him alone, a couple of days later, I put it in the room where he stays (he didn't get to crating, and here between us, neither did I), and there was noticiably less drool. He still messed with the door, and he _still_ drooled, but noticiably less.
Tonight I'll have to leave him alone for some hours too, so I'll be able to check out if there was any further improvement.
Keep in mind, DAP is not a _solution_ for SA, but it is part of an approach. Perhaps it will help you as well.
cheers,
--izar