About 5 years ago I "fostered" a chow mix. She was found in the woods with her second set of pups and rescued. She was very fearful, but submissive. I thought this dog was never going to enjoy being with a family.

Well, she's still with me, no longer a foster and finally has come out of her shell. It took a nearly a year to get her to play with the other dogs and and the toys. She still doesn't seem to need a lot of human attention, but will come to me occasionally to be petted.

Hang in there; he'll come around.