I never gave this much thought...... I usually call all 4 at the same time, so naturally they all come at the same time. They hang out mostly in a group, but even if they are scattered, outside they all get called at the same time.
He is your friend, your partner, your defender, your dog. You are his life, his love, his leader. He will be yours, faithful and true, to the last beat of his heart. You owe it to him to be worthy of such devotion.
Essy is nosey so she always comes whether I call her or not. Murray is always with me so I never have to call him.
Both dogs know their names though. Each has their own agility night where the other has to stay home. It's the saddest thing in the world to call Essy to get in the car and watch Murray's demeanor melt as he sits on his bed pouting. "Please take me mom. I'll be good." I remind him that he gets to go the next day. Of course the process repeats itself with Essy being forelorn.