We have an outcrop of the beagle, named Broo, which is about three years. About a month ago, I got a buddy, an old dog of mixed laboratory 6 months. Are Inseperable and immense love. The only problem is that the dog, JD, wants to play and chew on the older way of the dog after the dog becomes older. If several separate pens, and try to shout a a. Broo dog is a fairly laid back and rarely protects against JD 's who chews on it, but he screams after a while as it hurts. Is this normal behavior or something we should change? Do dogs know when enough is enough? Should we make some kind of training the younger dogs to get up, or is this normal matter dog?