Yes, I've had that feeling before...a few months before Bandit (my deceased Border Collie) I had an awful dream that he had died a horrible death...and it just freaked me out; the next morning I even rushed downstairs where Bandit was to make sure he was ok, and I woke up crying. When he did die later, it dawned on me, and I had that yearning to be with him again...it was so tough. If Duke is on his way "home", make it his best, but try not to think about death--instead, be grateful for EVERY SINGLE DAY you have to spend with him!! It always helps!