I am now on my third Australian Shepard. I loved your post. The bad news is that now at 8 months (3 months later than your initial post), your dog is a teen-ager. He is no longer a child blindly following you wherever, but he is going to test his limits. Be consistent with your limits. Just like a child becoming a teenager, he needs to know them. If you don't want him jumping on people, start now. If you don't want him riding in your lap as you are driving, again start now. Even if he is small, depending on the breed, he may become too large for your lap and become a hazard driving.If you haven't already, take him to a puppy class and start him on the basic commands. As a teenager, he may completely ignore you. The good news is that the time a puppy is a teenager, is a lot shorter than a human's teenager lifespan. And when they become an adult, you will not be tested at much, if you were consistent earlier. Also they become that adorable and lovable dog you loved back at the puppy stage, just more intelligent. Good luck and have fun with your "kid".