Doc will play fetch a little bit, but he's not that interested in it like some dogs. He's almost seven months old. Do you think he could still develop a liking for it or are they usually born liking it or not? I find it frustrating that he doesn't really like it because I would like to be able to help him burn off his energy when he gets in those bored, sometimes destructive moods. I take him for one walk every day but would like to play with him other parts of the day instead of taking him for another walk. Any suggestions?