I trained my first two dogs when my kids were teeny. Now I'm working with an 18-month-old rescue, Corky, and my kids are all teenagers. I've noticed that the dog will break many of his basic obedience rules with our teenaged son, Matt. Corky will jump on Matt's bed without waiting to be invited, he'll jump up on Matt, he'll chew on Matt's hands, he'll beg for food, etc. At first I worried that because Matt not only allows this bad behaviour, but encourages it, that Corky might un-learn our house rules, but it seems that Corky knows who's really the boss because he doesn't try this bad stuff with anyone else, not even my other two kids who aren't instigators like Matt is. What do you think?