I've read here and there that GSD need jobs, especially the German working lines. What type of 'jobs' are there for a GSD that's a home pet? I want to keep my GSD mentally and physically stimulated, but I feel there's only so much I can do in the suburbs. I don't have a fenced yard yet, but we walk several times a day. Inside, we do some training, tugging, ball play. We go to obedience class 1-2 times a week as well. What jobs do you give your dogs?