This is an important point often overlooked. They were not bred to be pets. A little jog around the neighborhood is not going to begin to be adequate exercise.
It borders on cruelty to put a working-bred heeler, border collie, or Aussie in an environment that essentially guarantees neurosis.
I have Aussie Shepherds and Heeler's and I completely agree. They become horrible pets if not given jobs to do. I'm not talking about just running around the block but those dogs are problem solvers and need to exercise the mind. Playing fetch is not sufficient either.
Fortunately we have a ranch a few minutes away that you can go and rent a pen with ducks, sheep, goats and cattle where dogs go and let their instincts take over. Kind of like swimming lessons; you progress when the dogs ability increases. There isn't much running around but it is amazing to see the natural instincts take over.
Also playing hide and seek is great too! Regardless those breads are extremely loyal more to one owner. Our dogs are great with kids but they need an alpha owner to respond to and they are very submissive to that person...VERY.