Your dog picks up your feelings as well as its own, so I would (as I have been doing with my other dog, which has been mopey since my little buddy Spot died) just take him on peaceful walks, see if he will play, and let him pretty much know that everything will be okay, even though there was a loss. Be positive around the dog, and the dog will be positive around you. I've been trying to keep that up since Spot died without any warning on Saturday at 2am after a sudden decline in health (6 hours from the first symptom on Friday night to death at 2am on the way to the Emergency Vet).
It left the other dog, a German Shepherd (too smart for their own good) desperately looking for his friend. He would sniff the vomit spot (which I was trying to clean) and run around the house looking everywhere for Spot.
http://jackuul.com/blog/goodnight-sweet ... 2004-2009/
My Spot. http://arachnists.com
my spider obsession.
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