We got our Baron two years ago this fall as a 8 week old puppy. He has proven to be an outstanding companion-dog. He quickly learned the boundaries of our property, which is surrounded by an invisible fence. Chasing squirrels and cats who venture here seems to be his favorite yard activity. He enjoys being in the house, although he is restricted to the mud room, kitchen and basement. This is due mainly to the fact that GSD also stands for German Shedding Dog. Romping madly after the quicker housecat (Simba) can also be an issue when things get knocked off tables in the chase.