We got Atticus from the shelter when he was approximately 6 months old. He has always been high energy and loving and never hostile. He has self control issues with jumping up on people. He is almost entirely house trained but is very demanding about going potty. If you delay taking him out at all he will just go in the house. He also has a bad habit of chewing anything and everything he can to shreds but if you watch him closely and give him something to chew on he won't destroy your house. He will bark if he hears something he doesn't recognize but he has never barked at a person once he sees us interact with them. He also has never barked at a person while outside on a walk. He likes to chase our cat but has never hurt him. We have to tell him to stop but he always listens. He also tends to pull on his leash but does much better on a harness.