Gracie is a little over 12 weeks old. We saw for the first time today, her being protective of a ball she found in the yard. She growled and snapped as us when we tried to take away. Any of your pups do that? How do you correct them for this? I don't want her to be like that when she gets older. I had a Chihuahua growing up and no one could enter a room if he had a bone! LOL!