Throughout human history, we have used animals for food and for work. But thousands of years ago, we began using them for something else, companionship. They became our pets. Pets are a source of comfort and happiness. They give their owners good feelings and a sense of purpose, especially during stressful or difficult times. And we are, indeed, in stressful times. In many parts of the world, people are under stay-at-home orders to slow the spread of the new coronavirus. Stuck indoors, many people may feel isolated and lonely. Having a pet, especially a dog, can help.