Caldwell was selected to join the Wright family and become a Sutherland SALT pet because he was the most spirited and unruly of Collie pups in his litter. He is a loyal companion for Scott’s six-year-old daughter Shelby—following her everywhere and sleeping at the foot of her bed, and patiently waiting for the many snacks she feeds him. Caldwell has pulled “Lassie duty” on several occasions, most notably when he shepherded her away from the street when Shelby struck out on an outdoor adventure at age three. Caldwell has his priorities straight—he is quick to leap fences to chase squirrels and climb rock ledges during family hikes, but is dependent upon Scott to lift all 90 pounds of him when getting him into the car.