The backyard was not a good exercise for my dog, because she would patiently sit under the tree and watch the squirrels. If one came into the yard she would run after it, but she was not one just to run in circles (if she was in the woods, then she would run around looking for things). She would also quietly hide under a bush by the walk and then playfully pounce (but not bark) at people when they walked by - often startling them (she was behind a fence). She was also not a fan of jogging. She loved to run loose or go on long walk, but if you tried to run with her in the city on a leash she would grow bored (not enough sniffing time) and was strong enough to stop on a dime even if we were going at a good, steady pace. She was always looking around on he run, so it was only a matter of time before something distracted her. I usually felt like I needed a chiropractor afterwards from the sudden stops. I am over-generalizing, but I do think certain breeds such as shepards and terriers tend to be smarter, or at least tend to get bored if not properly stimulated, and then cause more problems if they do not get the proper attention.