Many greys are very cat like, in that they go do their own thing. One of my broodies was what someone on GT described as a "background" dog. Not meaning it in a negative way, just that she was the opposite of an in-your-face attention hog She would often go outside or into the bedroom and hang out by herself. Doesn't mean she wasn't happy here, or that it didn't break my heart when she passed. They are also very sensitive, and changes in their world, like moving or having a baby (you, not him!) take them a while to process. He sounds pretty normal to me