I've been telling mom that I think Duke had some sort of stroke. So, I googled dogs and stroke and got this:
http://www.petalia.com.au/templates/...y_no=1872#ct-4
So, I guess he had a vestibular disease. Sounds just like what he was doing and they say it's over in 2-3 weeks. He's doing good today, which I'm very thankful. He was even smiling after getting the ear song from grandma. He's still just a little uneasy on his feet, can't walk in a straight line anymore and if he shakes his head or sneezes, loses his balance. But, he's a huge amount better and he's dealing with this minor imbalance just fine. I'm so happy he's well. Thanks for all your prayers and good thoughts.