" I was put in the cage, and Mother sniffed disapprovingly at the woman’s smell, which had been pressed into my fur. With a lurch, the truck started up again, and I was quickly distracted by the wonderful odors flowing through the cage as we moved down the road. I was riding in a truck! I barked in delight, Fast and Mother jerking their heads in surprise at my outburst. I couldn’t help myself; it was the most exciting thing that had ever happened in my whole life, including almost catching the frog. Fast seemed overcome with sadness, and it took me a moment to understand: Sister, his favorite companion, was gone, as lost to us as was Hungry. There was, I reflected, much more complexity to the world than I had supposed. It wasn’t just about Mother and my siblings hiding from people, hunting, and playing in the culvert. Larger events had the ability to change everything—events that were controlled by human beings. "
― W. Bruce Cameron , A Dog's Purpose Boxed Set