My troublesome terrier, Pepper, is a "runner."
Since I haven't a fenced yard, the dogs go out back on long leads attached to the deck. Pepper is a "runner", and the moment she knows she's out and loose, (somehow), she is gone. Everyday she goes out and experiments . . . shaking her collar or rolling on the ground, on the off chance that today will be the day the latch comes undone. Sunday was that day. Mother was frantic. Father offered to help. I was philosophical. I will hunt, but she will probably come back . . . barring getting hit by a car, becoming completely lost, picked up, or trapped somewhere. After walking the neighborhood in my Sunday Best whistling and calling, I got serious, changed clothes, leashed up Jack and headed out. We found her dashing up the lawns 6 inches from two very busy roads. She is safe again for now.