This little system is different than the system of going for a walk in the park.  It is one of the simplest I have with the dogs, because it requires no equipment, and has no special protocol for me.  It assembles itself before sun-up and waits with growing impatience for first light.  The only action required from me is to open a door into the background, and the dogs take care of the rest.  They do have their own protocol, which mostly involves a purposeful circulation through the entire yard, smelling everywhere for evidence of nocturnal activity.  After thoroughly covering the periphery, with special attention to the grape arbor, and the bases of certain trees, it dissolves into individual exploration, and eventually a return inside.