A really great way to train/prepare a dog for living in a family is NILIF, if you google it you will find lots of ideas of easy ways to assert your dominance in your daily routine. Although Charlee is my first yorkie, I've always had little dogs, and the biggest problem I find is that sometimes people forget that just because they are little doesn't mean they are not dogs. If you wouldn't accept the behaviour from a big breed...i.e. doberman, german shepard etc, then we shouldn't accept it from our 4 lb babies
