Thanks for the responses so far.

Den Anne Pen Payson is an estimated 3-4 years old, we adopted him about 2 months ago.

Thanks for your advice Moo. The class he's uses positive-only methods. We don't use clickers but instead we have a marker word. So where you would click, I happily say YES! then follow imediatly with his reward. I like the idea of setting up a visual barrier.

They do offer one on one sessions, maybe if we haven't accomplished anything by the time the class has ended then it's something we could look into. For now he's at least a doll at home. He doesn't bark, he's doesn't destroy things, he loves the cats, he's a really great dog at home.

Edit: Moo I looked at that second link you posted the trainer we use is one on the list This is where he goes. http://www.humane-so-arizona.org/training_classes.htm