“I think I could turn and live with the animals. They are so placid and self-contained,” writes American poet Walt Whitman (Schellenberg 1). Yes, pets have been part of human culture throughout history, and in American households, they are more common than children. It is reported that 58% of U.S. households have at least one pet, whereas only 35% have children (Whitaker; Witherell 76). Owners spend billions of dollars each year on pet food, accessories, and veterinary care, but apparently pets give back, too (Schellenberg 1). Med ....