Working with a dog who is not motivated by anything and very complex

What would you want him motivated for? My chow can't be bribed with treats or toys and I don't think there is anything wrong with her. She will move for a piece of chicken though. Just because the dog isn't playful does not mean she's not happy. Why don't you walk him in the morning or afternoon so he gets the exercise he needs and you can get him to socialize a bit. I always think if I was stuck at home all day with no one I can communicate with would I be happy? So I make it a point to walk my dog once even twice a day so she can see and "talk" to other dogs.