The person you got this dog from lived on a reserve correct? Indians and dogs live completely different lifestyles together then average people. The dog is part of the community if it completes a job and is fed. Giving affection isn't thought of as needed. Most dogs that are raised like that don't crave it because they don't know any different. Which could be this dog as well. Going inside your house was probley one of the first times its been inside a humans living area. I agree with Platz, about 75% of the time I would say that some form of abuse has been done...But I don't agree this time around....It sounds like this dog has been living in a wild state and it will take time to get used to domestic living. Staring will probley always be done, which isn't that bad honestly. The dog sounds like it pays attention to its surroundings, and people who now its meeting. Keep it positve and teach him a sit and stay in a spot that will give him a place to know to sit when company isn't trying to have a face to face.